That's certainly the theory behind collective action. But the problem is you can't go from nothing/online venting to organizing multi-thousand-employee walkouts

That's certainly the theory behind collective action. But the problem is you can't go from nothing/online venting to organizing multi-thousand-employee walkouts, any more than you can get up after years of bedrest and run a marathon. The capacity to effectively organize white collar tech workers at Amazon (or anywhere else) was never built up, and now it's too late.