When did this happen?
I was wondering the same thing.
One thing going for the US culture vis a vis science is that there is a stronger tradition to keep science a private affair. This being said, I do not see any particular humility in the way science preceives itself in the US.
If the pope speaks of condemnation of scientism coming from the worldwide Catholic Church, then he is of course correct, but I don't see any particular link to Catholicism in the US, which, if anything has a tradition of particularly appalling selectivity regarding the teaching of the Church.