Earlier quoted context omitted.
Well, maybe he had kids before he got to climb Everest. Does that mean that he should give up on his dreams, due to bad timing? There's really never a good time to climb Everest. It might be much better for the kids to have a dead father than a bitter, reluctant father.
I upvoted you for the 'never a good time...' line lolz, but your last statement is truly absurd. I assume you don't have kids. Nothing replaces a parent, even a flawed one.
That's easily refuted -- it depends on how flawed.
Talk to some kids who have been abused, abandoned or had debilitatingly mentally ill parents.
Compare with kids whose parents divorced or who lost a parent to disease.