Why? Is it weird to use whatever plate or fork? What about couch cushions? Umbrellas?
I see cars as tools, so there’s not “my car” and “their car,” but “the small car” (hybrid w/ great gas mileage) and “the big car” (minivan). Before we had kids, we only had one car, and if we needed to be in different places, I would ride my bike, walk, or take the bus. That almost never happened, and it wasn’t a big deal when it did.
Plates, forks, cushions, and umbrellas are not typically as personalized as a car.
And my argument is that cars should likewise not be personalized. They’re tools.
That’s just your opinion. To me, clothes are tools and there’s no reason to personalize - just wear black everything, that’s what I do. Other people don’t seem to share my opinion and that’s fine too.