But it’s largely tolerated because of the widespread cultural belief that waking up early is “character-building”. As if a late-shifted chronotype is a sign of laziness and sloth.
School buses still exist too. Kids in rural areas can stand at the end of their driveway and board a bus without parental supervision, provided their parents aren't totally paranoid.
It’s one thing to let your kids walk to and from school when you know there are lots of other parents around. It’s entirely another thing when you know the place is a ghost town until all the parents get off work and come back home.
Any other sport gets... whatever doesn't conflict with those.
At small schools, you're probably going to only have 1-3 members of staff qualified to train students (qualified is a very loose term here).
I suppose I could be mistaken about staffing conflicts. My small school didn't have a pool, so there really wasn't anything resembling any sort of water based sports (unless you just wanted to swim in a lake).