Sail your boat in any decent waves or a bit of a blow and your boards will see a good deal more than 80Kg loaded onto them. That being said, you're right - it shouldn't be necessary to bounce on a board to right a modern lightweight cat.

What I have had to do though is just stand on the board (not on the tip, no bouncing) and just lean back to pull the Stealth back up. This is not abuse, and the board (and slot) can take it comfortably.