Every 1911 I own has patches on the rails where the frame and slide have worn the surface of the metal. I don't see how this design could possibly be built without sacrificial wear of the rails and slide to one another.
I look at it as the "final fitting" of the gun. So, from that perspective, there's nothing to worry about.
The SR1911 I have is certainly the tightest, inexpensive 1911 I own. I always thought that was a virtue in the 1911 world. It's probably one of the reasons why the SR1911 has developed a reputation for being particularly accurate for the 1911 type.
I really don't see anything here to be concerned about. Do, however, keep the rails well lubricated. I like Posness-Warren grease for the rails.
That I could be wrong is an eventuality that has not escaped me. I just painted the pictures as I saw them. I do not know how to do anything else. (Saint Elmer, 1955)