I never check my Apple watches for damage or wear unless I’ve inflicted an
egregious wallop on it.
It’s a tool. It will accumulate wear. There is nothing anyone can do to prevent this; all the cases in the world won’t prevent that scratch from a tiny fragment of grit that works its way inside; no screen protector can prevent all damage. Sure, you can mitigate some of the minor stuff, but at what cost?
You don’t get owt for nowt in this world. If you put a case on your Apple Watch it looks like cheap plastic cack, and if you put a screen protector on it, the touch screen and brightness
are compromised, if only to a slight degree.
I have a “fancy” watch, brand Omega, value somewhere between 5 and 7 times what an Ultra will set you back*. It does not have a screen protector. It does not have a bloody
case. It does have a few scratches and marks, but they’re all part of the
wabi-sabi. I know a few people with watches worth many times this; whether they wear them daily or on high days and holidays, without exception, not one would besmirch their watch with a case or screen protector.
OP, I recommend you read this
short article and also the
Wikipedia page on Wabi-sabi. They may give you an alternative viewpoint.
*It’s also nearly 20 years old and is precisely as functional as the day I bought it, and will be thus (given a service) in another 20. The Apple Watch Ultra 2 on my wrist will be e-waste in about 5 years or so. Perhaps a decade at the outside.