Hang on, does the consumer or Apple know best?
I keep hearing complaints about how Apple don’t allow users to make the decision to compromise their device in some way, but you seem to be saying that users can’t be trusted to make their own decisions because they don’t know/understand what they are doing or the implications.
The consumer didn't even have a chance to make a decision without the knowedge of what was being done. Again if someone knew their phone was being slowed down due to prolong the device because of a bad battery I don't feel anyone has a problem with that. Just let the consumer know so they had the option to replace the battery if they want. I'm assuming there have been many users that are not interested in technology and would most likely just assumed it was time to upgrade as the device was older.