Usually the bus would not circulate empty and conversely I’ve been on fixed bus routes where there were 3 passengers, so what you are saying is very debatable, the key here is flexibility. The flexibility of on-the-go bus route rerouting has huge potential for lower density areas like suburbs or off-peak hours or as a complementary service, but I’m willing to listen to counterarguments to this.

You can’t be “fuck cars” and simply tell people who don’t live in cities to get fucked, you need to present alternatives and this is a start, maybe with smaller buses or vans, depending on live demand estimates.