That's one way to look at it.
I like RR because it is units of energy calibrated for the car you are in. This will be true in any car with RR you drive the future.
Percent is not calibrated at all, so someday when your rental car is an EV, or you get a 2nd car with different battery size and/or
efficiency your experience with your previous car will not help you.
e.g. A drive that took N miles of RR will still take about N miles, but the percent displays can be wildly off (e.g. Go from Tesla to a Leaf )
The trick is to stop thinking of them as miles. They are "units of energy calibrated to your car".
I'm probably wasting my breath here...never mind 8)