Because most used EVs genuinely have significant range reductions as they age? Its not an invalid concern. A lot of used EVs available right now didnt have fantastic range to begin with. If it had 150 mile range brand new 5-7 years ago it wont be getting anywhere near that after tens of thousands of miles of usage, and will only get worse from there.

Nobody wants to take a loan on a car that will have sub 80 mile range before the loan is even paid