If you have made a mess, you don't use dynamite to clean it up, you get a helper (therapist, friend, family member) and a couple buckets and soap, water, and a mop and together you clean it up. It is not that it is a "bad idea", it is more a ridiculous, nonsensical idea, it does not "solve" whatever it is that is the problem, it just leaves a bigger mess for others to clean up.

It is selfish in the sense that one "gives up" and in doing so, adds to the burden of all those others who are struggling. One actually becomes dead weight in the struggle for life. That weight is like if one becomes disabled climbing a mountain and the others hooked to you by the rope now have to do their difficult and dangerous task with the non-responsive person tied to them like an anchor. Some of those people fall themselves, they are having difficulty carrying their own weight and the added weight the disabled one has added, breaks them.

It's egotistical in the sense that it implies the person knows what is going to happen in the future, is a "god" and knows their circumstances (and their selves) will not change for the better. Climbing the mountain is difficult but tied to the other people, their climbing helps everyone move up to the top as much as a single person's dead weight can pull down.

It is short-sighted; one is looking only at one's own struggle instead of at the bigger picture too. There are always climbing partners but this person is operating as if one does not see them, is acting like they are climbing the mountain alone which one would not normally do. However, instead of realizing that one does not climb mountains alone and looking for one's team, one shrugs and takes on the belief the struggle is harder than it actually is/needs to be and thus cannot make it "alone" and falls.

It is condescending. It is the belief one is better than others and can make the climb alone, does not need any help.

It is dangerous. No one living knows for sure what happens when you are not. What we hope for, imagine, think, etc. is not the actual experience. Too, many suicides are unsuccessful and one becomes injured in ways that make living even more difficult and can take much of life's choices away from one. If I'm gambling, I'd rather face an unknown future where there's a chance things can get better than an unknown experience where even the chances are unknown.

We die anyway. What's the rush? We have this opportunity; the days a pad of artist's paper to scribble on, draw on, make lists on, journal on, write symphonies on, do finger painting, water color, oil painting on, fold into origami swans, paper airplanes, crumble and throw in the trash; why leave the pad only half used, it's needlessly wasteful.