Yeah, but busses actually consume quite a bit of fuel versus a smaller passenger vehicle, and in smaller towns running a regular bus that doesn’t have many or even any passengers might still be less environmentally sound, especially if they use an EV and charge between call-outs.

Even in my home town which is of decent size, the bus routes are super inefficient time-wise as they require a stop and transfer at the central station (making a trip take 1-2 hours) whereas taking the direct route up the highway is maybe 15m