This is the most important part of the article:

"This report misses the boat. What deserves the most scrutiny are not child sex crimes but continued clergy cover-ups of child sex crimes,” the advocacy group Survivors Network of those Abused by Priests said Tuesday in a statement.

One could not emphasise it enough.

And also...

It has been closely watched by experts, historians and advocates for victims and accused priests. This is because John Jay was given unprecedented access by the church — which paid for about half the study — to priests’ personnel files and psychosexual testing, as well as seminary records.

This is not "was given unprecedented access to church records", it's more like "was given unprecedented access to selected church records", which is a bit of an oxymoron.