that's some ancap crap if I ever heard some

Facebook and co hire psychologists to make their data collection as painless and humanly possible, most of the time people only ever fully realise the extent of the data collected once they get pinpoint accurate ads, at which point they even resort to accusing facebook of listening to your conversations. The point is, the average person can't assess what exactly you can accomplish with the data you share. You might, but that's typical HN preaching from the ivory tower shit.

Just because something works for you don't make it the best solution to everything.