I'm unaware of the implications of rock climbing training.
In Canada, the CPL, plus minimum experience, is the measure for being permitted to train and recommend for a floatplane rating. That is not a measure of the trainer's skill in that task. The very best float trainer I have ever known was only a PPL, so was never involved in the issuance of the rating to a new pilot. His training, however, was incredibly effective.
If the conversation goes something like, "Hello land pilot with Canadian license, I'm a Canadian float endorsed CPL who meets the experience requirements, and I am entitled to train and recommend you for a float rating in Canada.", that can be truthful, and not fraudulent. Skill is a separate issue, as it is with any license holder....
I think that consequences of a person's actions should be irrespective of their real or otherwise "qualification". If there has been fault exceeding "accident", rising to being criminal, the legal system should be applied.