Yeah, you're not wrong but the point is that there are no simple solutions that any individual can do within an existing society with how it actually works today. We can't just change a few things and then continue with the same level of comfort or speed. Much of how we live and work would have to be redesigned, then already existing technological solutions could work very well. Basically the objection is just a diversion from e.g. drastically reducing meat consumption that would have an actual impact.

BTW there are single person electric VTOL vehicles like the "opener blackfly" that use less energy per mile than a tesla car. Not less than a (electrified) velomobile of course.