Sounds like your problem relates more to salesmen not understanding the tax code, not EVs themselves.

What most people don’t realize is that their car use is actually severe conditions. 10k is good if you do a lot of long trips but if you are doing lots of short trips and if you have severe hot or cold weather you’d probably benefit from a shorter oil change. I haven’t researched it at length but I’ve also watched some videos where people send in oil samples for analysis after different oil change intervals that show a substantial difference in oil quality between 7500 and 10000 mile changes