The unstated implication of this is that when required to receive consent from users, the entire ad-tech complex falls apart.
I think Apple is actually smart to do it this way rather than just getting rid of the IDFA altogether, but only because of the political/regulatory environment right now. Any pro-privacy move will be spun as being anticompetitive by the affected parties, until Apple actually wins in court in their first antitrust case. After that the gloves can come off.