FWIW, as an avid hypermiler (who also owns an EV and pays for wind power), and works from home, the mpg per person of public transport isn't that great, I have no problem exceeding it, even without passengers (though I usually have passengers when I go somewhere).

https://www.afdc.energy.gov/data/10311

Certainly there are plenty of motorcycles that beat it without much effort/technique as well.

So, what am I supposed to be taxed for again? The environment inside a moving box full of strangers, and the scheduling headaches, doesn't excite me much as an alternative.

I wonder how much of the "decline" is because of people who work from home. I don't think uber is entirely the cause, more like uber displaced taxi drivers.