I think many people at big tech companies like Facebook truly drank the koolaid there, and when they got laid off it laid bare that the companies they worked at were just companies. Facebook, Google, Amazon, etc are no better than Microsoft, IBM, Oracle, or whatever other 20th century company they had come to represent the answer to. I think a LOT of people had really tied their identities up in being a big tech employee and when they got laid off it was like being cast out of paradise
To be fair, Facebook was a really really great place to work for the five years I was there. Given that, it's not surprising that people got comfortable.
Like, I've gone from 200 connections at FB to less than 100 over the years of layoffs.