Well its been 400 years. It will create more confusion at this point.
That's a weak argument, just as bad as Gregory VII Hidebrand's statement that "Diversity is the mother of heresy". Vatican II talks about the inculturation of the liturgy, but rather than going back to the sources of the culturally organic ancient liturgies, we get faux inculturation in the form of Polka Masses, Mariachi Masses, Folk Masses, Rap Masses. . . need I go on?
But whats happening obviously with the RC lay today is the "mine is better than yours" attitude.
Maybe a little competition will improve the abysmal state of liturgy on all sides?