It's unfortunately very much in the interest of Facebook's leadership team to discourage it, however, as a clock in clock out, see and hear no evil labor culture is good for the leaders' personal wealth, so ethics be damned, number go up.
There is a fundamental difference when you're talking about a stock-owning, educated, in-demand software engineer, even if they are "just" working on scaling Facebook's image service. They have the institutional power at the company that they could leverage to change the product's outcomes, if they so desired.
Institutional power doesn't have to be leveraged towards political ends, but if you profit directly from an institution choosing unethical behavior in pursuit of profits then you are also behaving unethically. It's completely reasonable to apply that standard to the best-paid of Facebook's employees, just as it is completely reasonable for those employees to petition against committing more unethical behavior.
Facebook themselves already admitted that they were used to further a genocide, so your dismissal is somewhat beside the point.
https://www.nytimes.com/2018/11/06/technology/myanmar-facebo...
Why does it sound good to anyone that Facebook employees should be prevented from discussing the ethical implications of the product they sell their labor to create? Facebook complete lack of accountability - internal or governmental - has to date:
- incited a genocide [https://www.nytimes.com/2018/10/15/technology/myanmar-facebo...]
- provided a bias for right wing content in a American election year (and fired the employee who blew the whistle on it) [https://www.independent.co.uk/life-style/gadgets-and-tech/ne...]
- exacerbated a global pandemic, indirectly causing 1000s of deaths, by not policing Covid misinformation [https://www.theguardian.com/technology/2020/aug/19/facebook-...]
- is arguably a contributor to the global rise in authoritarianism [https://www.theguardian.com/commentisfree/2020/feb/24/facebo...]
and that's really just the tip of the iceberg. If you buy into the notion that Mark Zuckerberg is a nice man in a hoodie trying to run a business that his employees are tearing down with some radical agenda then I'm sorry, but how naive are you? Facebook has a track record of ignoring the consequences of what happens on their platform in order to continue profiting. It's not a mistake, it's the point.
We should be cheering on tech workers challenging the ethics of the work they produce, not talking about how inconvenient it is for Facebook workers to start realizing how questionable the product they're building really is.