What about people that fear they won't be able to get another job? You say 'care about money' to make them sound callous but that could include people who care about being able to put food on their family table.
Those people should accept that they can't put their wallet where their mouth is -- and thus keep quiet.
It's completely okay for one to be unwilling to endanger their livelihood. I can sympathise with everyone having that sentiment.
But don't virtue signal and just move air. If you believe in the cause, prove it. If you can't prove it, get on with your day [and don't spam the internet with stuff you won't ever factually support].
Just because you managed to get a job at Facebook in the past doesn't necessarily mean you can get a job anywhere else now. Tech interviews are very fickle. If people studied for a Facebook interview but don't have the time to do that now due to something like caring for someone then they could be in trouble.
I am not saying its guaranteed that they will find a job but tech unemployment was at all time low and even a mediocre engineer could find a job before corona pretty easily.
If they are so unqualified to find a tech job in boom season then there were plenty of jobs outside tech too.
I don't agree that most of these engineers would never be able to find another job if they quit fb. Maybe a tiny % of protestor, sure.
Your parent poster has a point though -- tech interviews are awfully inconsistent and most people judging you do so based mostly on gut feelings.
You fill questionnaires and do elaborate solutions of rather complex homeworks... only for somebody to judge you by the grey hair in your beard or by you being caught off-guard on only one out of 20-30 questions.
1) Have little concern about the ethics. 2) Care about money. 3) Feel smart and important for working there (I'm smart, I made it).
This won't change their view on those things.