Where they failed was in not communicating this and trying to Apple Magic “it just works pay no attention to the man behind the curtain” when they should have been straightforward.
That’s basically this controversy in a nut shell. The tin foil hatting over planned obsolescence that always comes out has never made sense for a company that supports its smartphones with software updates longer than anyone else in the industry. Even this throttling was really about prolonging the usable life of your phone—you are more likely to think you need to buy a new phone if it’s randomly turning itself off all the time, rather than just feeling a little slower than it used to.