Yeah but it also denies the fact that we spend 1/3 of our working lives at work. It's extremely silly to say not talk about things that directly impact you, especially work related things.
It reminds of the crappy jobs I'd work at where management would tell us that discussing salaries was illegal, it's not illegal.
This isn't an 1880s mining town, Apple isn't the only game in town. Workers have options and I doubt Apple employees would honestly struggle to get jobs at other more remote friendly workplaces like Crowdstrike, SalesForce, or even Facebook.
It's one thing to not allow something, it's an entirely different thing to force people to stop discussing something because a massive multinational corporation feels threatened by a few hundred employees.
It is pathetic.