Suicide isn't anymore selfish than wanting someone to continue living so I can feel better. How do you balance the pure inner torment of a suicidal person again

Suicide isn't anymore selfish than wanting someone to continue living so I can feel better. How do you balance the pure inner torment of a suicidal person against the surmountable grief of those they left behind, multiplied by their number? There is no objective balance. I don't blame anyone who chooses suicide. Who am I to tell them to "man up" and deal with the torment? But I think we should do everything in our power to make staying a viable option.