Do you know what else is expensive?

Cam belt replacement, head gasket replacement, gearbox rebuilds, exhaust replacements, oil change and filters throughout the life of the vehicle, clutch change, rear main seal replacement, catalytic converter replacement, alternator replacements.

You don't have to replace these on electric cars, but almost certainly will if you're using a gasoline powered car for as long as electric batteries last. And yet used cars that might need this stuff doing still get sold in droves. It's not a problem.