When you accepted the job, you knew the terms. Those included not getting equity, and those included carrying some risk with known reward.
I don't see how the owners selling retroactively makes the risk-reward balance different. Unless you consider it a risk/downside that someone else gets a windfall and you don't get to share. That seems silly to me tho. How rich someone else is does not affect how much money I need to live, with a few exceptions (inflation, friends, power dynamics in pre-existing relationships).
Many people cannot afford to even own a home in the Bay Area because everyone else around is so rich. Relative wealth is important because "other rich people" drive up prices of everything, from housing, to groceries, to health care.
If my salary doesn't change, but the people around me get a 10% raise, my buying power decreases.
Apart from that, if people were serious about not selling, they’d make employees meaningful shareholders. Salary entails zero loyalty and zero stake in the company on the part of the employee. In the latter case, why would you believe that they wouldn’t sell? That’s what people do.
meanwhile they get to reap (in this case) 100% of the rewards from everyone else’s hard work. if that doesn’t make you angry, perhaps you should reevaluate whose interests your ideology serves.
It is sad when people see others succeed and get angry.