Do you know how planes land at an airport? They circle waiting for their turn. Why would that problem vanish?

... because the entire point of VTOL (which is what the parent commentary was about) is that you can take off and land vertically and therefore don't need one of a few, scarce, super-long runways? ... and the waiting you're talking about is entirely because of those?

On top of that, small VTOL craft that can hover and would be at lower speeds closer in (esp. autonomously flown) would just need less mutual clearance compared to jets, which also have an altitude band they have to stay in, as well as no ability to slow to a crawl and coordinate finely.