That's not completely realistic. A lot of people are attracted to companies like Meta because of unusually large paychecks. The whole "making the world a better place" schtick is just the whitewashing to help make them feel good about it.
If we start recognizing that we too are capable of awful things all while believing we are doing good, we can start self examining our ideas, motivations and behavior, to catch ourselves before we embark on such grouptrips.
But Arendt focused on the idea that exceptional evil can be perpetrated by people who aren't exceptionally malevolent.
Certainly at the C-suite level, the evidence is that people at Meta are exceptionally malevolent. There are direct quotes from Zuckerberg that illustrate this, like the one about people being suckers for giving him their information. As such, those aren't the people that Arendt was focusing on.
I'm arguing that there are many more people at Meta to whom that applies than you might imagine. They're aware that Meta has a bad reputation, but they choose to work there anyway because of a large paycheck. That's knowing participation. Slapping a facade of "making the world a better place" or "helping people connect" to hide that is not what Arendt was talking about.