When you rent a rideshare vehicle you're paying for both the cost of operation AND additional money so the company can profit. What, you think they're dumb and allowing you to run their cars into the ground below cost??? Are they non profits now?
You're also forced to drive even when you don't want to because of the weekly payment hanging over your head. The company then gets to write off the mileage your'e putting on their vehicle while you end up with a huge tax bill and no mileage deduction.
The rental company knows there's plenty of fake smart people out there that can't do the math. They love you.