Say you're a parent working for Walmart or Amazon. You have to get to work at 8.30AM so the store can open at 9AM. Your kid starts school at 9AM. How are you going to get your kid to school?
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.
I love that in this scenario, school is literally daycare and we're completely limiting our entire children's growth around the imagined concerns of billion dollar mega corporations. Instead of forcing them to give leeway to the humans they employee, we just legit ruin kids carcadian rhythm
School being daycare or not has nothing to do with this issue. If your child needs to be somewhere at time T, you as a parent typically need to take them there at time T, so you can only arrive at work at some time T + delta.
Now, while companies often have absurd requirements of their employees' time, I specifically chose the Wal-Mart example to illustrate a non-absurd requirement: a site needs its store clerks present at opening time to be able to open at opening time.
