We may live in a mad world, but it's also one where the inhabitants are incredibly lazy.
Motorcyclists are no different, really.
It's not that we can't do a top-end rebuild in under an hour using only a Leatherman, but we'd realy rather spend that time bench racing with a few friends and even more cold ones. Similarly, when one of us wants to ride off-road, the common course of action is to buy a motocross bike and then spend a thousand dollars more on a flywheel weight, lights, suspension valving, exhaust systems and the like. We'd go through this hassle because a motocross bike does not make a good off-road bike, and most of the offerings from various manufacturers are little more than trail bikes. A trick thumper with all the technological updates of a moto bike replete with the minimal accouterments necessary for an effective off-road weapon. We want to solidify our basis as the four-stroke leader.