It doesn’t bother me. I haven’t sold a gun in a long time and have no intention of ever selling another. If a gun has some honest wear, a quick trip to get it ceracoated is not very expensive, gives you a chance to do something unique, and is hard wearing.
That said, I have some glocks that have been in and out of holsters for over two decades and have maybe a little trace of thinning at the muzzle, and I have a wonderful S&W 39 that looks beautiful with its honest wear.
Keep in mind any bare steel is more susceptible to rust and corrosion and must be handled accordingly.
I have been carrying a dan Wesson 1911 with their duty T finish and so far no wear is apparent.
Wear is going to happen over time. It’s unavoidable. But there are steps you can take to minimize it. “They” say kydex wears a firearms finish less than leather. But to me, the key is keeping the holster clean. What causes most of the wear are all the little pieces of dirt, dust, lint, you name it, that works it’s way into the holster and acts like sandpaper on your guns finish. So, when was the last time you cleaned your holster? Do you clean your holster after every range session to make sure there is no carbon or powder particles from your drills left inside the holster?