I'm so sick of all these high level people resigning as if it's some kind of effective way of protesting.

It's not effective. You were in a position of power, and a place to actually make a meaningful difference, but now you have effectively relinquished your influence and power so it just can be handed off to someone else to abuse.

Quitting instead of staying and fighting for the good cause is straight up cowardice. Claiming that you are doing it as as protest is disingenuous.