

That catholics should practice confession is a religious belief. But the confidentiality part is from canon law - i.e. in terminology of most other organisations, it is a policy. It is a long-standing policy to punish priests for breaking it, dating back to at least the 12th century, but nonetheless the confidentiality is only a policy within a religious organisation, and not a religious belief.
Many organisations punish individuals who break their policy. But if an organisation has a policy, and insist that it be followed even when following it is contrary to the law, and would do immense harm to vulnerable individuals, then I think it is fair to call that organisation evil - and to hold them culpable for harm resulting from that policy.
Even if the confidentiality itself was a core part of the religious belief itself, religious freedom does not generally extend to violating the rights of others, even if the religion demands it. Engaging in violent jihad, for example, is not a protected right even in places where religious freedom cannot be limited, even if the person adheres to a sect that requires it.
I don’t think the litigants actually know this. The shady characters they are paying for the information probably know that, but represent that it will just work if they do it right.
Imagine you have some kind of legal problem, and you go to your lawyer, and your lawyer tells you they know what to do that will let you win. You’ll probably do it. Now for the litigants, it is the same thing, except instead of a lawyer, it is some person with an Internet and/or in real life following, who dazzles you with lots of fake formality that aligns to your preconceptions of the legal system based on TV. Of course, it is all just pseudolegal and a scam, but you don’t know that.
Now you might except that some critical thinking and/or research of authoritative sources like case law, or consulting a real lawyer might let the litigant see that it is a scam, but critical thinking skills are not as common as you might hope, and secondary education in many places doesn’t cover much about the law or how to do legal research.
Consider that 49.8% of voters in the 2024 US Presidential election voted for Trump, even after seeing the first term. Many people are easily hoodwinked into acting against their own best interests, especially if they are convinced there is a community of other people like them acting the same way (SovCit like groups do have some numbers), that people who endorse those theories get a lot of recognition / are influential (the leaders of the groups can create that impression), and that their theories have a long traditional backing (usually they make up a historical backstory).