As others have essentially said, to me the wearing of rose-colored glasses implies a refusal to see the truth or some inability to acknowledge it. In my opinion those who wear them cannot admit that they do.
There is something else that many of us fans do which is probably more along the lines of what is being asked about here. We do see the positive side of things--like the CBS special Elvis In Concert, for example, and we see those things even if they are masked in negative elements (which we don't deny, by the way).
We also like some lame songs and lame movies which we would certainly ignore if they featured anyone else, and it might not even be the case that Elvis made them good. He just made them, therefore we think they have merit.
But to me all of this is just what being a fan is all about. It's kind of like unconditional love; it's not a matter of not seeing a person's faults but a matter of those things not making you dislike that person. And in the case of being an Elvis fan I think many feel that the faults, those humanizing traits really add to the appeal.
Those who do not see the complete truth wherever it makes itself available don't understand what they are missing. If they can't take the glasses off maybe some green contacts would do the trick.
