Why? Why I say!?!
I guess if you couldn’t ride a two wheel bike, and spending a few thousand dollars on a trike is out of the question, then riding this is better than nothing. You would hear the roar of the engine and fell the wind in your hair. But you have taken perhaps the coolest thing on the road and turned it into something… not cool. You’ve also ruined a good trailer. Oh well.
Maybe this is like a training device at a riding school. You graduate up to having your “training wheels” taken off.