It may be to you, but it isn’t exactly easy or meaningless to someone else.
A large part of the pain of leaving and quitting is that it hurts people to see a place that they used as a means to escape reality is no better, that the people who crafted these worlds of comfort did so under stress and abuse.
Beyond that, WoW is an optional part of life that you don’t have to have, so it is easier to condemn the actions of these individuals compared to having to source ethical and affordable clothing or operating anything non-smartphone in a world increasingly relying on them.
Beyond all of that, the game is in a horrible state even without the pending lawsuit. People who were already on the fence about leaving due to the horrific expansion (which it really shouldn’t be so bad, yet here we are) that a reveal like this is more than enough for what is effectively the final straw.
At the end of the day, you can make a choice for yourself. But you don’t get to condemn people for making choices about their own life. Nearly every corporation on this planet is an evil, soulless machine, but you can’t just boycott them all. You have to pick and choose your battles, and some people have decided Blizzard isn’t worth fighting for.
Feel free to stay, feel free to give yourself a medal for this unnecessary input into the situation, but you have no grounds to judge others on. Just the same with everyone else attempting to shame people with whataboutism.