Depends how you set the rules, & how you then review them.
If you & I agree, SGB, that school uniform is a load of wanky petty officious time-wasting, but we are lone voices, & the parents of the other 998 children at our dc's school are vociferously in favour of blazers & boaters...
...then my reaction would probably be, well, I'll tell my dc they're stuck with the uniform. Yours might be to choose a different school, or home ed. Fair enough.
It's the pick'n'mix approach to school rules that I have a problem with. Because you & I might think that uniform rules are a 'valueless arbitary system', to quote TigerDrivesAgain - but lots (in most schools, a clear majority) of parents are going to think that uniform is a splendid notion. Plenty of arguments either way, tbh.
Meanwhile, someone else thinks that their kid shouldn't have to do homework. Or detention. Or keep their views on white supremacy to themselves.
At some point, somebody, or a group of somebodies, are going to have to decide what rules & expectations the school is going to have as part of its operating system.
& I bloody agree with everyone who says that fretting over uniform is a waste of time. Let's abolish it, nationwide, as of Monday, if the country's parents want rid. In fact, screw the parents - they don't have to wear it. Let's have a plebiscite of 11-16 year olds.
But you are going to have to have some rules. Or there's no come back against the racist, the homophobe, the bully, or just the kid who derails every lesson (s)he attends.
So we're back to drawing up rules - & who gets to decide them. Student body? Great, they're usually much stricter than teachers would be - & less out of touch than the governors.
There's no way it should be about being 'narrow-minded' or 'stupid' or not questioning rules. Of course rules should be questioned & challenged - constantly.
Did I mention that I think the OP's dd's school were bang out of order, & the OP should ask them to review their policy re: uniform issues & isolation?!
Gah.