What happens, is your underserved bus has to increase stops per loop for viability.

You have areas where leaving the cul-de-sac zone takes 15-20 minutes on foot; so you need a stop or two in the zone.

Now you have a short walk to the stop; but if you want this to be a viable alternative, you need some frequency of service.

And that means that the routs need to be active across the whole week, not just the hypothetical peak (otherwise everyone needs a car anyway).

So how do you actually get a high average number of riders per bus? More stops?

But if each stop needs to go in and out of a cul-de-sac, the travel time goes up.

Eventually people stop tolerating the extra time, and get cars.

So you end up with a case of empty busses running... Seems much worse than a waymo.