I don't see any overblowing. There have been a few waves of departures, first in early to mid-2021, then a year after, and now more recently. You don't have to take my word for it. Look at LinkedIn and search specifically for those who came from Apple. Did thousands of employees leave? Of course not! But how many do they have to begin with? Some reports before the acquisition cited 250 total for NUVIA.
I would not downplay the role of a skilled team. Sure, having someone who can drive good designs on many fronts is way more important, but remember, somebody has to make those ideas happen. When you lose weeks because your not-so-good RTL engineer can't get to meet specifications, it makes a difference.
Of course, new blood is always welcome. It is just not a good sign if you are onboarding people worse than those who have left.