@Kenjiro M. Yoshimori My point was more focus on the
validity of the rites as they are in the books with their
vocal rendition. Since some people believe the new ones are invalid or dubious even ''
in normal circumstance'' as I said in my comment above to
foward.
Of course, a pizza and beer Mass is invalid with an obvious defect of the matter.
''In the new rite, anything goes''. Globally, yes, we all know that.
If God was to give us the real stats about liturgical abuses and defects, the ministers of the new rites would badly win in nearly every category; except one.
The coming of an audible liturgy with the use of local vernacular languages, create a context in which the ministers (priest or bishop) have nowhere to hide. It is unlikely for the faithful to hear a text of the Mass delivered at excessive irreverent speed, mumbling or extremely indistinct mumbling, word skipping, skipping of sentence or paragraph.
I am not talking about those who are changing the text with improvisation, alterations or even their own written text as we saw in the general context new rites (1965-1969, 1970 onward), but rather in both in the modified Vetus Ordo (1965-1969) and Novus Ordo, those who are claiming to follow the liturgical books.
Also, up to 1964, the real Roman rite was number one above all the other Latin rites and was used by the vast majority of the priests. Now a small number of priests are using the Old Roman rite, so they are on average much more conservative and dedicated to the liturgy, materially as well as spiritually.