Of course, if Apple was losing talents related to old boring product lines while attracting new talents to work on new exciting product lines this would balance out.
But I don’t think this is what we are saying is happening here. They seem to be both losing out on the old stuff and struggling to attract/retain related to the new stuff.
How do you know? Do you have a list of all the employees leaving along with a list of new employees to compare?
Employers leaving or getting poached always makes news. Employees being hired to fill new roles never make the news.