Given the context was explicitly "teenagers", getting to school is generally something kids can be expected to handle on their own. Admittedly having to arrive to early sucks for the few that truly rely on their parents to get there, but at least it only sucks for a few. (My school did start first at 8.30 (I think) and then 9, this is completely normal in many countries)
Of course teenagers can get themselves to school. The problem is with younger kids. They will basically have to go to daycare before school, making their day even longer.
