You’ve touched on a key point, I think. Doctors and other professionals have mandatory reporting because a) they are in positions of respect and trust within the community, and b) they are professionals, as defined in law, and have standards to uphold.

Priests definitely meet the definition of a), however b) is a bit of a sticking point: their role isn’t defined by law, but by the church. Furthermore, a court can order you to go to therapy sessions, but they can’t order you to go to confession - it’s completely voluntary. A therapist could tease out previous abuse, but a priest will only hear what the confessor wants to tell them about.

I’m in line with you in thinking that everyone should report abuse, but I think that a priest has more in common with an average person in this regard compared to a person working in a legally protected profession. There would be legal consequences for impersonating a therapist, but not for impersonating a priest.