I served as a volunteer for 22 years in a land/water search and rescue team that practiced on a regular basis. I’ve seen quite a few practice sessions that were all too realistic. One definitely learns from such sessions, but at an excessive level of risk.
Recall the 2012 tragedy at Skookumchuck
– a routine training trip to show new RMSAR volunteers how to go through the rapids at high flow and perform a rescue – which resulted in 2 deaths. And yes… Coast Guard were in attendance….