[sopooneo]

I used to work in Boston Public Schools, so I have some context that may or may not address your point. One issue is that for the most part, Boston does not do "neighborhood schools" anymore. So a kid could easily have a 1.5 hour* walk to get to school. However, your point about busses largely stands because, at least for high school kids, the district mostly partners with public transit to bus the kids around.

* Downtown Boston is tiny. But the actual official city is pretty big, and dips much further south than many people realize.