> that also means the OP thinks anyone who doesn’t contribute to sustainable model (>=3 children) is an awful person.

The OP did not say that, for one thing. You're the only one who's used the "awful people" phrase (which is what makes that a strawman, as I pointed out several comments ago).

OP would prefer to raise his kids to see reproduction as a positive aspect of life, as opposed to the current secular "wellll, you can do whatever you waaaant, but it's a whole lot easier and more fun if you just go ahead and kill your bloodline" that's a logical extension of your pseudo-enlightened "no one choice is better than the others" non-answer (only a logical extension, of course, when ignoring self-preservation and societal preservation as legitimate concerns).

I don't know what country you're in, and I don't know if things are actually different there or if you've just convinced yourself that as long as you don't see a problem with your blinders on, there isn't one. But with regards to "let people make their own choices," someone already threw that argument out (in a different context) elsewhere in the thread, and received lots of good answers explaining how we live in a society and you (and your kids) are affected by everyone else's choices, one way or another: https://news.ycombinator.com/item?id=42705948

Although again, OP didn't even say those people shouldn't exist. He said his family's able to get by without them, and correctly identified that they are not reproducing, expressing optimism that future generations won't have to co-exist with their ideals anyway (I can't say that I share that optimism; there are too many do-as-I-say, not-as-I-do folks around, as well as people like you who may facilitate the spread of bad ideas beyond the bloodlines they kill off out of some sense of respect).