I would not be able to discern 10k miles or less for a car is an outlier from those data points, it does not say anything about the underlying distribution.
Not to mention the whole female column is pretty much 10k and below, as well as men over 65.
This is a little bit better breakdown, but I could find miles driven by decile. I would assume it greatly differs by location and is greatly skewer by people who drive a lot.
https://www.thezebra.com/resources/driving/average-miles-dri...
Either way, the purpose of the miles driven per year in cost calculations is because after a certain amount of miles, the up front higher cost of electric is offset by lower per mile costs of driving electric. Assuming fuel costs stay the same, then people who drive less have less incentive to go electric.