How are they entitled? Employment is a business deal. Apple has something the employees want, money, and the employees have something Apple wants, their labor and know-how.
These folks have other options and both they and Apple know it. There's absolutely nothing entitled about using your talent to negotiate an employment situation that suits your lifestyle.
You can have the most talented folks in the world but if your working culture is not productive, it means nothing.
Apple has decided that a return to office should increase productivity. It's likely that they've collected enough data to make this decision.
Also, I'm sure Apple has calculated that some people will leave but they're ok with that. They probably want people to quit anyways so they don't have to pay layoff costs.
You think Apple would come out and say their productivity has decreased, therefore they need people to return to office?
It'd be a huge PR nightmare.
That's why they're entitled.