I can understand the presumption that 2 wheels are safer than a 3 wheel wheels back trike has the standard 3 wheeler does not handle well and does steer quite hard.
However when compared to a correctly designed wheels forward trike this all goes out the window. A wheels forward trike is totally designed around handling and steering where a conventional trike the steering is just something you must deal with the best you can.
The wheels forward design is much more stable in corners and during stopping, has a positive predictable feedback responds and in general is as safe as any well built sports car as the steering dynamics are the same.
CanAm has paved the way to the improved and much safer/sportier trike design and in time this will probably be the standard setup. And along with it a much safer alternative to the 2 wheel layout.