I know all too well the harm it can do. My daughter's boyfriend blew his brains out all over my daughter a few years ago. She is still having problems with that. I have no problem with him killing himself. Just the way he went about it.You quoted the OP and said 'I agree.' The OP said they understand about stepping in if an act HURTS other people. Suicide HURTS other people- you already AGREED with the OP's statements about that- so how can you now say that you don't want some dogooder stepping in? Either you agree that harming others is a reason for people to step in or you don't.
The act of harming oneself harms those around them.
I had a good friend years ago who blew his head off with a shotgun. He had cancer and it was coming outside from the inside. Do I blame him. No. So please don't try to tell me how I feel about suicide. I have given it more thought than anyone will ever know.