I think it's because people either read too much into a question or too little. For example, I see the question posted here ad nauseam: "What is the meaning of life?" Some may consider this a deep philosophical question. I think it's irrelevant. You can contemplate the unanswerable until the rapture and never arrive at a conclusion. I don't attempt to answer questions such as why we are here. I accept the fact that we are, and try to make some sense of the world as I find it. Sometimes philosophic questions remind me of the two fables, The Emperor's New Clothes and the Gordian Knot. Sometimes people see things that aren't there, and sometimes they complicate the obvious in what I regard as a pseudo intellectual exercise. I find both ludicrous and inane. I'm sure this is why practical people often find philosophy foolish and worthless.
In a personal aside, I often smile at the thought that most philosophers are men. I don't for a moment think it connotes a superior intellect. I think it illustrates the fact that historically women were practically slaves to their husbands, and while the lazy bums were off contemplating deep questions like how many angels can sit on the head of a pin, their poor wives were raising the kids , cooking, cleaning, and doing all the non-philosophical things that allowed their husbands to sit around discussing what was the meaning of life. Too bad they didn't ask their wives!