Damn, that's extreme, isn't it?
The problem isn't always that the writers are "too inept to create" new characters (no matter what the sexual orientation or racial background may be); sometimes, the readers only care about another Batman or Spider-Man title and don't give a
f#@& about new characters that aren't legacies of pre-existing ones. It seems like it's very rare you get a brand-new character from DC or Marvel that is popularly accepted by the buying public. Even Marvel's most recent break-out star,
Ms. Marvel, is a new character with an old name.
Doesn't matter how well received a new character may be among the critics . . . it seems there are some buyers who won't take a chance on something totally new.