alt Hacker Newsyou made too many false assumptions if you came up with those routes. Experts have run real numbers including looking at what happens in the real world. https://humantransit.org/category/microtransit - (as I write this you need to scroll to the second article to find the useful rebuttal of your idea)
Yeah, yeah: "Major US Public Transit Union Questions “Microtransit”" Read it. Go on. It's pure bullshit.
The _only_ issue with the old "microtransit" is the _driver_. Each van ends up needing on average MORE drivers than it moves passengers. It does solve the problem of throughput, though.
But once the driver is removed, this problem flips on its head. Each regular bus needs around 4 drivers for decent coverage. It's OK-ish only when the average bus load is at least 15-20 people. It's still much more expensive and polluting than cars, but not crazily so.