Whether or not you intended it, this reads as a bad faith response: you’re claiming those are “the same group of people” as if we haven’t had more than a decade of commentary about the difference between the best paid FAANG employees and contractors working at the same place, or even awareness that those companies hire more than one role. For example, during the recent thread about Google closing a daycare there were many people saying only the executives could afford that and even fairly highly-ranked SREs struggled.
A far more likely explanation is that your memory is grouping everyone who works at a FAANG in the same bucket rather than recognizing that there are multiple groups and the people who are doing well brag while the ones who aren’t complain.
So compensation is high but if you look at profits of the companies many workers actually aren't capturing much of the value they are generating. So yeah the people unionizing are getting paid like 200+ thousand a year but when corporate profits are 400+ thousand a year per person there's a good argument that they should be making more.
Also this is assuming that the only point of unionization is pay and that's just not true. My experience is that pro-union people have a variety of things. One example is that I once worked at a place where they initially denied an exception to return to office rules to someone who had an immunocompromised family member. A union allows workers to collectively put their foot down on policies that are unacceptable. Honestly tech workers are often paid well but very stressed out.
This is an aside but overall I've found the anti-union sentiment in tech to be weird in that they view standing up to management as some sort of weakness. To me the real cowards are the people who will watch an asshole in a 200 million dollar house dictate policies without ever even considering fighting back. I don't get how people have made continuously rolling over in front of management a virtue, it's just silly.
Edit: to be fair maybe the anti-union people have never had management do stupid or unfair policies and maybe they haven't seen their company laying people off while announcing tens of billions in stock buy backs but too many people in this industry have and it doesn't make them a "snowflake" to want to fight.
> many workers actually aren't capturing much of the value they are generating
That's not what happens when you're an employee. You exchange a guaranteed salary, sick leave, holiday, etc, for your time and expertise. "Capturing value" isn't part of the agreement, any more than a third party toilet cleaner, who also is a vital member of an organisation, doesn't get to "capture" the value that's derived from their work.