If you're 'trained'in handling LSD, then very powerfull mushroom trips are probably easy to deal with.

Thing is, that many people who try weak cubensis, may have certain expectations when they take shrooms. When they suddenly take azurescens in equal amounts, they might be totally surprised and overwhelmed. They get way more then they ever could even imagine then.

I can see that if you thought you where going to get just some gigles, and suddenly your room has changed into a 10dimensional shapeshifting knot of wires, this could totally freak you out.