Flying a single person or two, with VTOL? That's an incredibly high expenditure of energy per person-meter traveled. Much higher than regular aviation, which it

Flying a single person or two, with VTOL? That's an incredibly high expenditure of energy per person-meter traveled. Much higher than regular aviation, which itself requires a lot of energy. Considering the prospects for decreasing availability of fossil fuel, and questions of climate impact, it seems to me that this is not sustainable on a mass scale, at all. I would guess this initiative will either become an alternative for the very-rich to using helicopters, or not get off the ground. (... ok, that pun was a little underhanded, I admit.)