It's not like people have an unlimited number of places to work, even if they have Meta on their resume. Many of my colleagues (and myself included) had struggled in the job market in the past before landing at Meta. If it's work for Meta, or suffer more tumult in the hiring market; it's easy to understand why many might decide to take the offer even with the moral implications. I used to bring up politics in the office with coworkers and many people are simply unaware of the consequences of the company's products. There are a few different categories that these people fall into, but the main ones I saw in the office:
1) Chinese H1B holders who are happy to be working in the US at all, and generally apolitical (or view anything as better than the status quo of where they come from)
2) Just normal people who are interested in their own lives and have never been trained to think about the world in a big picture way (some overlap between 1&2 exist of course)
It's very western of us to always be tracking the conseqentiality of our actions even when we're just the cog in a wheel at BigCo. I think that it's the right thing to do, but this sort of reasoning largely absent in eastern cultures, or even for some in the west—even among those who are well educated. It's kind of hard to blame individuals when they either are rightfully consumed by worrying about their own welfare or are for whatever reason not as seminally hyperaware or woke as we can be in the west. Growing up I liked imposing my political philosophies onto everyone; maturity is understanding that even objectively righteous values are only useful for the right types of minds.
On the contrary, once someone has truly been made aware of the ramifications of their actions; it's more difficult for me to extend my sympathy to them. I consider mark and priscilla to be fully implicated based on their exposure to the harm that they're actively, willingly, knowingly causing. Other employees may never get that memo, though, people obviously avoid political talk in the workplace.