I mean, from the post it sounds like they already have a bank account large enough to say what they want without any repercussions having any side effects, such as unemployment.

Also, not all future employers are totally worried about that, especially when those that were doing the speaking have a very wanted set of skills. Quite often the future employer is like "Oh yea, everyone knows Meta/FB is balls, glad you pointed it out", especially in the case they are much smaller than the mega company.