Earlier quoted context omitted.
Because lots of people still think that if you own a piece of hardware, you should be able to run whatever code you want on it.
With focus on privacy Apple successfully reducing users wanting freedom. The marketing now seems to indicate that if you want freedom then you loose privacy.
There will always be the possibility that some company will ask users to their absolute freedom ability to give them absolute freedom. Which is basically exactly what happened in this case. The only difference is, in this case, Apple built in a mechanism where they can stop individual actors.
And, to protect their users, they used it.