It seems to be the same in very field, wherein experts study beyond the level of general knowledge and experience. With music though, i can't find a helpful analogy.I'm not sure if by "musically inclined" you mean that they have more musical potential in some sense or if you mean they are more knowledgeable about certain aspects of music. Both are no doubt true. Even though I've read the vast majority of this thread, I'm not sure if the people posting here mostly view music appreciation as something one enjoys or something that requires specific knowledge. My estimate would be that roughly 5-10% of listeners would be capable of analyzing music from scores. Others listen and decide how much they like the music. I think the percentage of truly knowledgeable people might be even lower for literature, art, and sports so perhaps my estimate is too high for classical music.
The disconnect I have seen in these discussions I believe stems in part from those with specific knowledge and those without it attaching different meanings to concepts in discussions. Each side is certain what is being discussed, but I think each side is arguing something rather different, and hence, no or little progress is made.
People like Pluto as the ninth planet for all the cute and comforting reasons. The planet scientists don't care about that. They care about facts, logic, consistency, helpful categories, and future applications etc.