I have two in my garage right now, I'm all for it. Small displacement motorcycles can easily take over a large amount of trips that are currently done in cars. Except that winter weather conditions in the US preclude motorcycling for a lot of people for a good portion of the year. This means that many motorcyclists will have to trade a motorcycle ride for some other form of transportation quite often, which further means that a lot of motorcyclists are going to also need a car. The individual cost of parking, owning, and operating two vehicles is going to be prohibitive for many people.

Yes, small displacement motorcycles should be part of the solution. We have to recognize that they are not going to be a complete solution. That said, don't let the perfect be the enemy of the good.