You are a kook.
Virtually every pro team plays on Sundays and HS sports dont usually do that because there is no easy way to get all of the players in to practice on weekends.
There is no “for us” at all.
Even a team prayer isnt allowed - might offend a muslim or an atheist.
We are talking High School, not Pro. However, many HS teams do have practice on Saturdays .... so why not Sundays?
If you can't debate without tossing insults, you already know you have no point or you are incapable of intellectually defending your statement.