Have you read the Grand Jury report? (I'm at p. 306.) This was systemic, motivated by a desire to protect the image of the Church, aided by the (misplaced and unearned) esteem in which the public held religion and religious institutions.
And we know it's going on inside other Christian sects that certainly don't follow the precepts of Vatican II--the Anglican Church, the Society of St. Pius X, various Eastern Orthodox Churches, and Jehovah's Witnesses, just to name a few.
This is, if anything, a problem with the doctrine itself, not a problem with doctrinal laxity.