People never have legitimate concerns about pay, working conditions, etc.?

> A business isn’t a social club.

A lot of them are more social than anything else. Likeability supplants pure efficiency, and people hire friends, or people they want to spend time with.

Apple isn't like any business you've worked at before. While this movement might have signs of social activism, Apple's culture of secrecy is sui generis. It's been a long time coming for any sort of pushback against it, and it makes sense that it took a pandemic and enforced WFH for the systems of control to begin to break down.

As to whether or not their grievances are warranted, try asking any of your colleagues who used to work at Apple, and decide for yourself.