As humans, we’re naturally quite skeptical and the ability to ignore flaws and things that are different is an acquired one rather than something that’s innate. It could be argued that it’s only social convention that stops us meeting somebody and saying: “you have a large spot on your nose”.
Talking to somebody who has a slightly strange accent means that although they’re perfectly linguistically understandable, we often won’t really concentrate on what they’re saying until we’ve pinpointed the accent. The idiom is often “the elephant in the room”.
The problem is often quite exacerbated when the flaw is part of something that’s otherwise rather beautiful and pleasant to look at. An Oriental rug will generally have symmetry and well-defined patterns which if damaged suddenly gain an undesirable focal point.
Any kind of damage to the material of an Oriental rug requires immediate attention to prevent it becoming worse. The structural integrity of a rug depends on the materials become sound, much like a window. You can’t break part of a pane of glass, the pane is either broken or intact.
Another issue that may be less noticeable is discolouration or colours running which if caught early enough can be restored.
A regular look at your rug is most certainly worth doing to prevent every houseguest remembering the worn section of your rug rather than the rest of the rug which remained rather amazing. They’re only human.