I wish I was brave enough to venture out on a lake in a kayak. I have a friend who's just as old as I am who isn't afraid, and she handles herself and the kayak just fine.
What am I afraid of? Mostly that I'll get caught in the darned thing, it will flip upside down, and I won't be able to get out.
So why do I bother wishing I could learn? Because I'm enchanted by the vision of skimming across a quiet lake at sunrise, enjoying the peace and quiet.