By that logic, railroads should should still be running steam, so they could hold on to more employees and have lower profits. Just because a Tesla doesn't need an oil change, doesn't mean that they won't have wear and tear.
Right, I hate it when people say making things last too long would kill job so we cannot do it, because it is going to put people out of jobs. We would be driving cars with 5 digit odometers because they won't last more than 60k without a rebuild, I'm glad we are over that now. The world has moved on, we are not on horses and buggies anymore.
Regarding to charging, Hertz would likely roll out Tesla only if they are near public super charger and then use them to charge at fast charging, it will hurt the battery long term but for their business model they don't care. You buying a used Hertz Tesla you would expect them to be fast charged and you would expect not to pay the best price for it. Fast charging would likely be "fast" like 80% in 1 hr fast, they likely would be available in airports or downtown near a shopping mall anyways.
Regarding to what if people return them empty, they would be paying an arm and a leg like they do when they return a gas rental empty, or they can prepay for a full tank of "battery" before they leave.
Regarding to the world not being ready for EV, or gasoline being cheaper: unless you are in Saudi and Texas this is not a guarantee, a lot of nations or states in US have high gas price and low electric price, and if infrastructure money pays for charger at work, the cheap duck curve bottom solar will be subsidizing the charging at work vs at home, so that would likely be the future of off peak charging (while at work).
It is easy to tax anything that has an odometer on it, you guys have inspection or smog check no? or maybe in the future you need to use wifi to send the reading to DMV once a year or you have to visit a mechanic place to get it read and sent for $50? Something like that.
I have a feeling that Hertz pick Tesla because they speculate the resell value would be good, and the supercharging network. I am not sure if they will get a discount from Elon though.