The only thing essential in the Mass is the consecration and communion. Still, the Church Fathers and doctors all venerated inessential things such as the Roman Canon, offertory, Gregorian Chant, and the like. Up until Vatican 2, the Church always treated old, universally-practed and papally sanctioned inessentials with the utmost reverence, reforming them only rarely and incrimentally. Never before the 1960's was there such a radical and rapid purge of such inessentials. The post-Vatican 2 reforms are totally unprecidented.
True. The Church should have allowed the Tridentine Mass to continue to be offered, alongside the Novus Ordo. That was a big mistake.
But non-essentials are non-essentials. Jesus tried to rid the Judaism of his day of silly laws and observances and strictures and requirements. "Strain at gnats and swallow camels."
But, those who wished to hang on to the non-essentials after Vatican II should have been allowed to do so.