Cars last decades but need updates/maintenance along the way. Cars are so expensive it is worth buying a new battery over a new car (or even smaller things like oil changes). There is a sufficiently large market for used cars so there is value in my car being able to run after I get rid of it. I am comfortable leaving my car with a stranger to get fixed because there is zero personal information on it. There is also less cost to not having your car for a while. Even weeks. You can get a loaner, uber places, use a friends/spouses car, etc., and as long as you get where you need to be there are little costs.

On the other side, if all phones could do is text, make calls, surf the web, I would not be willing to spend very much money on one which means it would be easier to replace than get fixed.

People think of phones this way but really all tech is similar. We don't have any tech for decades, even if it could last decades.