Earlier quoted context omitted.
Even so, that person will not be you. Even if they will go through exactly the same things you've been through they may not have the same experience. You cannot know if it was worth it for them. I think it's fine if people don't have kids, I just find the reasoning "what if they suffer, etc" a cop-out. You cannot know that beforehand and even if they suffer, they may still find meaning in life.
Regret emotions etc. are only possible when you are alive. Missery etc also can only be felt when you are alive. You clearly don't take any responsibility at all otherwise I'm lost on how easy you just dismiss concerns.
Maybe your need to pass judgement on my character based on two posts should tell you something about yourself. It really takes an inflated ego to, as a non-parent, talk about responsibility with a parent. Paraphrasing: "Responsibility as a parent is heavy as a mountain, deciding not to have children is light as a feather".