There have been a few cases where Rome has stepped in, emphatically: e.g., the 'banning' of the priest/nun wackos from "New Way Ministries," the squashing of "liberation theo," etc. But Rome does not act in the American way, with press releases describing her actions. They really prefer to treat people with some dignity. There have been all KINDS of actions taken, resembling those of Bp. Burke--a letter is sent, but we NEVER know about it unless it becomes clear that the letter/condemnation/whatever MUST be made public for the sake of the Faithful (in Burke's case, the letter was made public through the press, which found one through an open-records request; subsequently, another letter-recipient admitted on direct questioning that he, too, had received the letter.) Needless to say, recipients of letters/admonitions from Rome are typically interested in keeping it quiet.
My answer only attempted to show that corrupt,abusive priests act in secret,usually affect one victim at a time and lie.If the Tridentine Mass was done in the same situation;that is,in secret,for one person at a time and tnen denied by the priest,Rome would not act on it either.
OTOH,if the abusive,corrupt behavior was going to be offered to all to partake of and publisized,as would happen if the Tridentine Mass was offered,Rome would be down on the offenders in a nano second.
One action is hard to discover and confirm,the other by it's very nature is verifiable.
On rereading your post I think you were questioning the non-action on liturgical abuses in the New Order mass via a vis action to those who offer the Tridentine against the bishops wishes.Even in that case it seems to me Rome is not at fault but instead it is the fault of the amchurch bishops AND the nutso concept of collegiality AND the gighjscking of the top of the USCCB pyramid by nonCatholic infiltrators who impose their agenda on the body of bishops.