21. In order that the Christian people may more certainly derive an abundance of graces from the sacred liturgy, holy Mother Church desires to undertake with great care a general restoration of the liturgy itself.
Do you believe the Christian people more certainly derive an abundance of graces from the "sacred" liturgy of Bugnini's Mass than the Mass of Pope St. Pius V, Hieronymus?
I believe that “holy Mother Church desire[d] to undertake with great care a general restoration of the liturgy itself.”
I don’t believe Bugnini delivered this, but that is a separate question from what were the goals/wishes of the Fathers.
One could point to similar disconnects with other councils where the desired future and the actual future diverged.
FWIW I attend the EF to the extent that I am able, but believe that so long as Jesus shows up too, going to Mass in general is worth pursuing and encouraging.