This very good question. Sometime I was thinking , but as this is for myself and I am not here to judge others.
So, if I eat too much, am I killing myself? I have been thinking about that for a while.
So, if the doctor tell me take this medicine and I refuse , am I killing myself?
I really don't know because my brain is so little , but to our Jehovah God have so big brain than me , he knows everything from right to wrong.