This is no big deal-—and common.
I had grandchildren graduate from 3 different suburban high schools in the Boston area and they ALL had to take the busses into downtown Boston where they had the prom in nice hotels.
They were then bussed back to their schools.
Makes perfect sense—and I guess a lot of mischief took place in the limos when they were allowed.
.
I really don’t know what to make of it, or feel strongly either way.