Seems like a smart strategy, sounds a lot like a bus but just automated and much smaller in size, particularly running through residential areas that are typically seen as not worth transport investment.
The minivans are probably much easier to climb into (for injured or impaired individuals) compared to an SUV which may have an unnecessarilly high ride height and a door that doesn’t slide across for extra room
100% this is the best choice for op IMO.
A big pro is that they literally don’t need any Google services whatsoever by the sounds of things