The proper analogy was the one I gave where it's purely an aesthetic choice.
Yes. But then it becomes - the GM gets to have their aesthetic choices, and someone else doesn't get to have theirs. That doesn't sound terribly fair.
The common counter is "Yes, but he GM has to put in more work, and gets to have more say in the results".
The counter to the counter is that the player only has
one thing they get to choose the aesthetics on, so maybe they ought to be allowed that, hey what?
Taking the logic a touch farther because it may be illustrative - why don't we just give all the players pregenerated characters that are
absolutely sure to fit the GM's aesthetic? Because they may not find what we give them aesthetically pleasing, or enjoyable, because it may not be what they
want to play, right? Because they are supposed to have some choice?
So, why draw a hard line in one place, rather than another? Seems pretty arbitrary.
Thus, the argument comes down to defense of an arbitrary choice, and we then see why it cannot be resolved.