Well, maybe. I thought it was a reaffirmation of existing dogma so hard to understand why all the dramatic benefits. Maybe because of chemical birth control it had to be stated anew? I personally don't recall anyone or anything changing but then my interpersonal network is very small.
However, I'm just old enough to remember 1967 and 1968. It "felt" as if it were all going to change; and all the powers that be--- I mean ALL the powers that be in academia, the media, government, the medical, legal, and legal professions, the Socialists, the Capitalists, the racists and the racial-justice activists, the humanitarians, the libertarians, the contrarians, the punditocracy, the academic theologians, the opinionators in the secular, Protestant, Jewish and emphatically the Catholic world --- The Papal Birth Control Advisory Commission for God's sake! --- said it was all going to change.
I remember that Dr. John Rock, the guy who ran the clinical trials for the oral contraceptive, was a daily communicant who could not even conceive that the Catholic Church would find any problems with this.
Paul VI went against the entire world. It was Paulus Contra Mundum.
We may live to see how important this was. It may require first, sadly, that several nations be annihilated.