If you want many things to land approximately at the same time and place, you need a little bit of play to schedule the arrivals/departures and ensure that you don't have collisions. There is a limit to the amount of aircraft you can safely cram in any amount of space.

Any aircraft you imagine will circle at landing and possibly loiter for minutes while waiting for their turn at using the airspace. (Edit0:See helicopters)

Building an open skyscraper for aircraft to land on will not save you since crafts will lockdown a large part of the building to land/depart safely. And it's not clear to me that it would be profitable.

Then many other problems about energy density and aircraft weight limiting the whole scope of who would possibly use those crafts.

Have a good one!

Edit1: I don't know for you, but my city doesn't have enough parking for cars. I'd be surprised if there were enough parking for EVTOL everywhere - you could very well need to loiter waiting for a spot to open, could need emergency landing if you run out of power, many many un-perfect things that make the card castle fall apart