Why should we develop a uniform sentencing law across the 50 states?

So I don’t know if this is a opinion question or a like strict I want this answer but I would say something like
I think we should consider uniform sentencing because the chances of kids getting bullied for not having cool cloths is lower they all have the same outfit and you can sorta make it your own in your own way.
But the counter argument is that if you have school uniform enforcement is that going against the freedom of speech/ expression amendment I don’t know if it’s honestly that serious but if I where you I would say something along these lines.
Good luck I hope this might help