A great many suicides are not rational thought involved processes, but severe downswing mood episodes...or, a massive depressive feeling makes suicide seem like a relief.
A rational person rarely kills their self, it's a moment of extreme darkness and irrational actions.
I've been around a very few self-killings, and usually they made no rational sense...one was the result of a Cocaine comedown and was a serious waste of a really cool person.
Ya can't make sense of most suicides...