And the liturgy our Eastern Catholic and Eastern Orthodox brothers and sisters use comes to us from the fourth century (the Divine Liturgy of St. John Chrysostom and the Divine Liturgy of St. Basil) which they celebrate with no problems. Maybe the insistance on the Mass of Paul VI to the exclusion of other forms of the Roman rite is what is rigid. Why does everyone else get to keep their noble heritage but us Roman rite Catholics are encouraged to loathe ours?
And it can be argued the Ordinary Form clericalizes an elite group of laity. I don't believe for a second the EMHCs would give up their posts without a fight if the priest shortage ended tomorrow.