I agree. At least it takes "one" of the things out of the equation.

If it's not clothes, it'll be watches, shoes, smartphones, underwear, hats, notebooks, whatever. Uniforms aren't going to stop teenagers in the midst of puberty from competing with each other for status.

If every material thing get removed, you think it will end up as a competition through physical and intellectual qualities ?

Or arbitrary social bullying, like we have today.

Clothing is protected expression. Being "for [mandatory] uniforms" is being "for censorship".

That's a kinda blunt equivalence. What school children wear is so rarely about expressing ideas that the censorship potential of such a policy is tiny. Besides, censorship in the classroom is hardly new, nor is it controversial.