stupid dresscode

why does my school wanna act so strict. they literaly did not care at all last year and now they wanna be psychos. like hello i can't show even a tiny bit of midriff with out getting drescoded,thats so stupid because then they send us to detention. like bro  wtf am i supposed to wear its litteraly so hot outside but i can wear a crop top. i almost got drescoded on the second day of school for wearing shorts, they werent even that short T-T.