Agree. I didn't necessarily mean to attack those points, rather I'm annoyed by this entire discussion on HN.
Clearly, most people didn't bother to read the PDF, check additional sources or do a basic background check on the author, whom is a well known authority on the matter.
With just a headline as input, people confidently disagree with the conclusion. Completely dismissing the research. And by posting such disagreement in a way that is relatable to all parents and by wording it in a fancy way, it seems an insightful comment, so it gets traction.
Superficially, it looks a healthy and intelligent discussion. In reality, almost all of it is way off and baseless. There's no truth finding. It's just Reddit with more steps and fancier language.
The other half of comments is people projecting, with random thoughts on housing and inflation, as if a 12 y/o gives a shit about that.