There's nothing dumb about it. Sure it's an infinite answer to a finite problem, but when you've gone as low as you can go for long enough, your mind begins to poison you. Every other thought tells you how you're useless, a burden, a drain on resources. You begin to rationalize that if you're a net negative to your friends/family/society, maybe you should just end it so others don't have to deal with you. You see, your mind builds it's own logical case for your death because it believes things will never improve. If you're calling that stupid, you're lucky enough to have never experienced it, and I hope you never do.