I don't think hunting out of a some small watercraft is necessarily pushing any luck. You understand what you choose, and you use it the best you know how. The best part of the account was that when an emergency came up, there was the will for it to turn out okay.
Experience is a great teacher, and I wouldn't be surprised if the two hunters fired at waterfowl again out of a canoe. They thought they knew about potential stability problems, now they probably approach things a little differently. Mother nature didn't dump them in the water, they did.