There's the simple physics of a vtol craft when landing needing to push down a lot of a air very fast just to lift an average human - plus the weight of the craft itself. There's a reason helicopters today don't land on street corners even if there's no rotor clearance issues. And these "personal" VTOLs don't seem any lighter than a helicopter of a similar size - for example the "Air One" is twice the mass of a Robinson R22 - ~400 vs ~970 kg empty.

The idea that they would be common enough to seriously disrupt "personal transport", even restricting to the "premium" market as it's known today is crazy. Imagine a fancy party where every 10 seconds everyone on the red carpet is being blown away by the backwash of someone landing - also disrupting everyone else trying to land there at the same time.