EVs are best for the types of driving we do on a day-to-day basis. Short commutes in areas we know well. Charge at home over night and 95% of the year you never worry about charging.
Renting a car means I'm usually either driving long distances or im somewhere new and I don't know about the local charging infrastructure. Can I charge at the hotel? What about at Disney World or the San Diego Zoo or wherever else I'm driving on vacation? What if there are no super chargers nearby? Etc...
Maybe in a couple decades of battery/energy tech advancements where we can charge faster or swap batteries easier EVs for rentals will make more sense. Until then it's just extra stress you don't want when traveling. I know that's not why Hertz is dropping Tesla (the article sites high repair costs) but it's just my personal thought on rental EVs.