Oftentimes being able to run whatever you want makes it harder to provide a cohesive, consistent experience that’s pleasant to use. Look at X vs. Mac or even Windows to see what I mean. The inconsistency of that experience has imo been a major factor holding back desktop Linux (notably, locked-down Linux-derived environments seem to do fine).

the two aren't mutually exclusive, apple can give the consistent experience and also have an "okay, you're the owner of this device, you make the rules, not Steve Jobs" setting that isn't as beautiful but also doesn't try to boss around the user