[stocknoob]

The bus driver is just a component of the system; the quality of transportation system itself should be getting better (cost per mile, electrification, GPS tracking, etc.). I can pull up my bus schedule and its current location in an instant. A decade ago I'd be waiting in the cold for a bus that may never come.

In theory, the quality of the education system itself should be improving (online classes & evaluation, recorded lectures, more materials, sharing of the best techniques, etc.), of which the teachers are a single input. But, we know how that's turned out. Education is a political football and society doesn't actually care about the outcome.