I'm not here as a lawyer, and it is a bit difficult to contradict a former judge.
All I can say is that, in Canadian legislation, there are a number of cases where the protection of professional secrecy is nearly absolute, but there also others where it is less absolute. In my opinion, it will depend on how people try to apply that provision.
In response to a previous question, I was going to say that it is often possible to answer a question by somewhat changing the level of details in an answer, while providing the basis of the response.
We call that aggregating up.
That is also the case when it comes to professional secrecy. Depending on whether we are in Quebec, in Ontario or in Nova Scotia, and depending on the profession in question, it is always possible to somewhat manipulate answers to enable the review organization to obtain most of the information required without, I hope, spending several months before the superior courts engaged in a constitutional debate.
I know that I am not quite answering your question, but I am somewhat limited.