I still say it’s the long-term result of Vatican II, when everybody’s favorite liberal pope decided to make drastic changes to most of the Catholic traditions, beliefs, and ceremonies.
Once they let the “lay” people in charge, all hell broke loose: cafeteria Catholicism was in vogue . . . pick what you want to believe . . . no more respect for the consecrated Host . . . no more respect for priests or nuns . . . blah, blah, blah
Too bad you’re among those confused about what Vatican II did and did NOT do.
In fact it was an excuse for those with ill intentions to misuse the purpose of Vatican II.
Read the documents and you will find that it was only the unintended liberal application which lead to the changes you cite.