No kidding, but let's compare
No kidding, but let's compare apples to apples, not apples to oranges. The safety of a motorbike will never be as good as a car, but I would think the safety "feeling" of a Prius is more like being in a Fiat, Mini Cooper, etc. (comparable size, weight, amount of plastic, etc.). Your comparison of the safety of a Prius to a motorbike is not much different than saying I feel safer on a motorbike than walking in the middle of a freeway, gee, no kidding.