Because there totally are no lore friendly alternatives like X-Factor, X-Force, Generation NeXt, X-tinction, New Mutants [wait they fucked up that one already multiple times], or various others that were used to make the characters stand apart from mutants as a whole.
This is like making a new Avengers film but calling it 'People' because that's still what they are at a basic level.
Because there totally are no lore friendly alternatives like X-Factor, X-Force, Generation NeXt, X-tinction, New Mutants [wait they fucked up that one already multiple times], or various others that were used to make the characters stand apart from mutants as a whole.
This is like making a new Avengers film but calling it 'People' because that's still what they are at a basic level.