I really get the feeling that many companies are just blindly doing whatever other companies do. One starts large layoffs, and suddenly everybody is doing it. At other times, when one goes on a hiring spree, they all go. One tries to reduce salaries, they all do. One pays enormous bonuses, and they all do. It's like CEOs aren't really thinking for themselves, just copying whatever the market does.
It seems much more likely to me that many companies over hired and/or have 2-4% of their staff they were planning on letting go anyway and now that so many other companies are doing layoffs it allowed them to cut other low performers without being the only company in the news.
We talk all the time about large company bloat. This just seems like normal annual pruning + a little extra from over hiring during covid + a chance to cut xyz projects that havent worked out or someone doesnt like or whatever without catching as much bad pr as they normally would.