The Propeller DOES drive it...but the lift is providedby UN-Powered rotors...and helicopters have a unique ability to
Autorotate and given the weight ratio this one would likely do that very well...however I must agree that the chance of you having to 'coast to a stop' into a forest canopy on your bike is slim...whereas you might have to autorotate into one. Still...life is short and when it's your time it doesn't matter if your "droping the boys at the pool" or autorotating into the tree tops.
