No I don't see that refusing medical treatment is the same as self-destruction. But refusing any treatment is - meaning that if one refuses medical treatment, then they should be seeking some kind of alternative treatment.
I have good reason to believe that we all have sufficient energy and resources deep within ourselves, we have resources unknown that are quite powerful that can heal us. This is unknown to us, only because we haven't tapped into this innate power to heal which we all have. The reason why we don't tap into it and access this healing power, is because we attach to the existing structure, which is basically our self and all that we believe is true about ourselves. Healing is a process, and when one comes to the point, to take it one oneself, then it is a necessary step to become independent from authorities. I see it like taking the reins into one's own hands, and learning how to become a creator or healer of oneself. One can only fully heal oneself, by stepping out of the way - by removing one's blocks, the main block being our holding to the existing form. There is only one method or technique or protocol needed to do this, it requires no desire to heal something, nor any intention to have one's healing happen in the way one thinks it should happen. The only thing one has to do to heal is to surrender, to surrender one's identification with one's reactionary habit of being the personality. This is basically known as the meditative state. When one is in a meditative state or an altered state of consciousness, this is when healing happens. You trust, that your innate healer knows how to heal you and will do it, if you will only get out of the way and allow that to happen. more you dont' need to know. every second of true meditative state counts - this is what heals you - so I see the task is to discern the difference between what is surrendered and what is not. seek to increase surrendered and withdraw wasted energy from not being surrendered. I know of a meditation/technique which one can do which immediatelly rises one's energy - provokes expanded states of awareness or meditative state - which makes it easier to surrender, simply because one's energy is higher. This is good to do when one is sick or losing energy, because then normal sitting medition and/or daily awareness moments is harder to pull off the more one is sick, tired or losing energy. One needs a boost. No intention is needed - on what to heal or how to do it - the healing will happen by itself in the most efficient and intelligent way. In fact, You or 'you' can never figure it out. That's the beauty of becoming fully healed, you do it by surrender. Slowly, then your innate being takes over, making the changes needed to allow that to happen. The only thing people need to learn to do to heal themselves is to use their will to find ways to increase and lengthen one's ability to enter into surrendered states. I think it's good to try different things (forms of meditation), if you aren't getting the result you wanted. think of it like an experiment, zero in and see what works and what doesn't. as one goes one gets more discerning to be able to clearly see the difference. I say nearly every day as a reminder to myself when the talker gets activated: every second counts, just shut up and let the healing happen. Each day I am drawn more to the quiet, tingly feeling of just relaxing and being healed. it feels almost like an incubating state when one is healing/quiet/meditative.
PS: i think healing happens when one's energy is raised up, when there is extra energy left to do the healing. there are many ways that energy can be raised/freed from held structure - personality - and released back to the system to be used for healing. Sleep at night is a main healing that happens when we shut up each night, medication can chemically fix energy problems *temporarily* so also can rise the energy. so if one takes an aspirin for pain, it can release the grip on id with pain in one's body. meditation releases the grip the the holder and so heals us when in meditative state. fasting rests eneryg needed to digest, so raises our free energy. exercise strengths muslces and nueron flows inthe body so raises our energy by boosting our flows. good diet takes less eneryg to process than junk food, etc. massage releases stress/tension, hot baths, etc. walks in nature. healing happens in the space of most treatments, it happens because one energy is simply *temporarily* higher. that's how i see it anyway. of course pills aren't a cure, but neither is massage or a good diet. the cause of problems is holding onto the existing, the cure comes from letting go. Put all one's energy into letting go, which is not really a doing, more like an unknown. then Trust.
edit: if the last edit was directed at me, then I just want to try to clear something up. In no way am I saying that meditation is not the most effective thing, on am in any way trying to convince people to no do it. my whole answer is about meditation and the surrender state. what i was saying is that is someone's energy is very low, then it can be that when they do a sitting meditation, then what can often happen is that they fall asleep. this is not bad in any way, it's what they need, so they sleep. what i was trying to say is that if one is very ill, tired, sick, etc., then it might be helpful to add in other things, ways, aspects to rise one's energy higher - to get a boost - so that there is more time spent in a healing state. i think healing happens in sleep, but healing is more effective when one is meditativley aware. so i see the challenge when sick is to find ways to lengthen/strengthen the amount of time spent in conscious meditatoin.