Unless things have changed recently, I believe it is still standard Rolex SA policy to replace damaged/worn or out-of-spec parts with new parts during a standard overhaul. & this is generally a requirement, not an option. They do this because it is the only way they can guarantee the watch's proper function & specs, which is a prerequisite to their accepting a watch for service in the 1st place. Rolex's policy, which for all but a few RSCs in the EU, has been carved in stone for decades & the reason why so many gen owners, especially owners of vintage watches, so often choose to take their watches to independent watchmakers, who allow them to pick & choose which parts they replace or not. Remember, unlike companies like Mercedes-Benz or Patek Philippe, who service pretty much anything they ever made, Rolex SA is not in the (vintage) watch restoring business; they are in the (new) watch selling business.
As for not wanting to notice, it has been Rolex SA's policy since at least the 1980s to verify each watch accepted for service by serial number & to use that serial number to verify the format of the watch. That is, they know what dial, crystal, band, crown, etc, the watch left the factory with. Certainly, in the case of vintage watches &/or those non-critical components that Rolex themselves no longer manufacture or have available, they will not reject a watch that arrives (as mine did) with, for example, an aftermarket bezel insert. Knowing that, I made a point of informing the watchmaker of the aftermarket insert in an effort to see if Rolex could replace it with the correct part (knowing they would require such a swap if the part were available). Unfortunately, as I was well aware, TOG inserts have been extinct for decades & if Rolex had any, they were reserved for clients with VIP status. So, I think, all in all, since the rest of the watch was genuine, Rolex had no reason to suspect anything. Now, had there been an aftermarket crown, crystal or caseback, I expect I would be telling a much different story (ie., the story of RSC rejection that is typical for most frankens).