I agree with you 100%. Normally, it comes down to how a lot of the schools and the school districts are looking for a cheaper way to travel. If they're going on a ski trip, they will take a school bus versus taking a coach because, of course, a coach is going to cost them more coin. It's on a highway. They're on a highway in winter conditions, in a school bus. They're playing a different game. It's much more risky.
Of course, for me, whenever I have a coach available, I'll send a coach, for my comfort zone, knowing I have a coach on the road, not a school bus—for the same cost.