The physical capabilities of the car do not increase with the # of hours it is driven. If you work a car 5x as hard, it will require a similar increase in maintenance and an overall shorter lifetime. (Lifespan. As measured in calendar years, not miles driven)

I’m not saying you’re completely wrong on the general concept, but the relationship between value increase and drivable time per week (or whatever unit of time) is not 1:1. There’s going to be some loss in there.

Also not all cars would see drive time increases. Those used as Ubers or similar certainly will, but that won’t displace the vast majority of car owners who will continue to own a car and drive it at similar rates for the convenience of having it immediately on hand, at all times, ready to go. If it self drives too then that’s great, the claw back some personal time during a commute etc.