It is a principle of long standing and is uncontroversial.
You know, your second grade catechism books were perhaps not the most definitive and complete representations of the Magisterium. LOL.
I’m not telling YOU not to go to the modernist Mass. But I do have to wonder — where would the blind obedience end? If the Masses in you area were celebrated by a lesbian feminist witch priest who fed the Eucharist to her dog would you still feel the obligation? Any limits at all?
Sorry, that’s easy. It wouldn’t be Mass. The Vatican will not give in to women as priests nor practicing lesbians (celibacy is a requirement of homosexuals wishing to be Catholic).
Easy.