I can't get what you're on about if it's important to develop a wet exit ,that is one of the first things you should be teaching in basic skills courses.Firstly so the novice knows how to get out of their kayak when they capsize and secondly to see if they suffer from involuntary gasping reflex,when I am teaching a novice that is #1 cab of the rank,show them how to get out of capsized kayak and then have them do it without a skirt and finally with the skirt on.I stand beside them so if there is a problem you can assist if they show signs of the gasping reflex ,tell them straight they should think about some other sport..A wet exit isn't a solid self rescue technique, it is one of the most important skills a novice HAS to learn to do properly.As for a bomb proof roll,I've yet to meet anyone with a bomb proof roll,both in whitewater and sea paddling,I've seen some of the very experienced paddlers that I have respected since I started paddling miss rolls and have a swim,some times you get in situations where you can't roll no matter how good you are.The other thing is if your novices aren't capsising you're not doing your job of developing their skills and confidence levels by leaving them in their comfort zone and not pushing them into the adventure zone ,and knowing when to pull back if they approach their disaster zone ,if you're doing your job right ,they should be wet at the end of their devolopment session.