Dammit, I just saw someone's post making this awful equivocation. Again.
This comparison we see so much of here on WUS drives me batty, for being so incompatible on just about every level.
A badly made car can significantly increase the chances of your dying, while a high grade one can significantly reduce them. It's that simple.
Nobody dies, or gets mangled, from wearing a badly made watch.
The difference between a poorly made - or even a cool "vintage" car - and a well-made one actually affects your chances of survival. No watch does that. A set of good tires is NOT like a nice rubber strap.
As for "luxury"? Fit and finish? As long as watch does not pinch or dig into your wrist, you're not likely to notice its presence for any negative reason.
A car with a much higher grade of material & finish will most definitely affect how your body feels after driving on a long trip, to say nothing of safety.
But a watch? It ticks, tells you the time.
The pleasure is entirely in your head, not in your body.
It would actually be far more accurate to compare watches to other accessories: ties, pens, keyboard, etc.
A car is NOT an accessory. People often confound these two totally incompatible categories, just because watch and car both fall under "machines."
But that would be like saying that a chicken is like a man because they are both upright standing bipedal animals.
Nope, not enough to establish a working category.