Staying on this earth purely for superficial benefits for other people is a cruelty to yourself.
I say superficial, because the fact is, some people here have kids, and that to me is a responsibility beyond your own life. That's not superficial. My heart aches for users to want to KTB but have children that they will be leaving behind. I can't imagine the selflessness it requires to stay alive for your children. Don't get me wrong, people with children have every right to KTB as anybody else, I just feel it's a extremely large struggle that all of us can't relate to, and I just want to acknowledge I'm at least trying to understand how hard it is.
Your life is your own, and nobody knows you better than yourself. The outside world might see you as selfish, but they can't see the negative outcomes of your continued living, so it's not fair.