First you need to prove that. Second, even if true, he was only one priest
The comment about Jean Vianney was taken from the book on his life by Trochu who used ONLY sworn statements made for his canonization.
Yes he was only one priest but in the early 1800's I think priests were more in unity with the church and didn't make up sins on a whim.
This no absolution for actors is also mentioned in the autobiography of a Jesuit from the 1500's. The book is called Hunted Priest.