Yes, but suppose you had your way and we didn't have an "Albums" category. It would be a pain in the ass to have to search for all the albums under each album's initial instead of having a quick list to access them all.
Now suppose we do have categories like that and someone comes and sees Tranquillica. The thing with "Albums" and "Releases" is maybe a bad example because both are easy to think of, but suppose that person wants to read DT's tour information. He looks under T and doesn't find "Tour". So he looks under C and doesn't find "Concerts" either. "Gigs" doesn't come to his mind, and he leaves the site thinking it's incomplete. But if we had all three categories and two of them just redirected to the other it would solve that. I'm not talking about three categories sharing 80% of the information. I'm talking about three pnames for a single category. Kind of like Wikipedia, where sometimes a name redirects to another article.