This thread is absolutely bananas. I actually read most of it at 759 comments.

The short version is that people with kids are insanely defensive about it. In many cases, they have literally rewritten their brains to see reproduction as exclusively good and necessary. If you suggest anything else, you will be swiftly brigaded and condemned.

Those without children are all over the place. Their opinions vary from complete disinterest to strong resentment of parents.