They're not the ones deciding, nor the ones carrying out unethical actions. Employees working on technical infrastructure are not even enabling censorship or fake news, that's been possible on any centralized social media site forever. I don't see how "I was just following orders" even applies here.

Anyone intelligent enough to be building these tools should have a good idea of how it can be misused. It’s not like Facebook has a solid history of doing the right thing.