Sure, if you believe that making more money is the only thing that matters in this world. If you take this logic to its extreme you can justify anything if it makes you rich. You're simultaneously criticizing a system while defending your participation in it.
There are lots of things wrong with working at a FAANG for the money. If you don't like how Amazon treats their warehouse workers, don't work at Amazon. If you don't like how Facebook perpetuates fake news, don't work at Facebook. If you don't like Google's search monopoly, don't work at Google. Just because the world is a shitty place doesn't mean you can excuse yourself for being a shitty person.
In countries where real threats to democracy like that exist, Facebook and Twitter have played a huge role in communicating suppressed information, aiding protest organization, etc. and by and large the kids are into it.
As for a pivot to a Tiktok-style experience -- that's a hard pass for me, it's like mixing cocaine with television. The kids are into that too and it's pretty scary to watch them switch off their brains, set aside their humanity and obediently wait for the ML algorithm's function calls to twitch_human_thumb() that arise every few seconds. Of course people were saying something similar about MTV, remote controls and the boob tube back in the day and somehow we survived...
Ultimately if you're Meta and the government tells you it's OK for you to sell cocaine, after all they're OK with your Chinese competitor importing it -- who are you to say no?
Under the current climate my only confusion is why we haven't let Coke reintroduce their namesake ingredient to their formula. Or to use your example yes I could totally see Taco Bell lacing their meat with drugs if it was allowed!
https://twitter.com/USA_Polling/status/1552006668514369536
Two-thirds of respondents (67.2%, 95% CI 66.1%, 68.4%) perceived “a serious threat to our democracy,” but more than 40% agreed that “having a strong leader for America is more important than having a democracy” and that “in America, native-born white people are being replaced by immigrants.” Half (50.1%) agreed that “in the next few years, there will be civil war in the United States.”
I would never work at Meta, not because refusing to do so would make me feel good, but because working there would make me feel like I'm making the world a worse place.