I agree with your conclusion - I don't think we're going to see personal flying transport anytime soon - but I think you're exaggerating the case against.
The energy requirements to get something the weight of a human aloft are considerable
It actually isn't that much energy to get a human being up 100 ft (humans are light, and transportation is already very energy expensive) nor does it necessarily take a ton of energy to keep them there. Physics has no problem with (just as an example off the top of my head, not actually practical) a mass transit system made out of escalators and gliders. There's no absolute reasons such a system would take a ton of energy, be all that expensive, or even require bonkers infrastructure; it's just nobody has a plan to do it that would practically work.
So yeah, I think it's silly to imagine huge fleets of conventional VTOL aircraft - but I don't think there's good reason to write all this off as permanently impossible or something, it just needs more creativity than this plan has.