I agree... choppers handle lake crap, they look cool and there's nothing wrong with drag racing when there's no turns involved, but in the twisties you'll want proper geometry and precision. Do a google search on "rake and trail" and you'll get an insight on how it effects a bike's handling, then look at the way a crotch rocket's front end is set up compared to a cruiser, you'll notice it's almost vertical and much closer in so the wheel can be maneuvered either direction very quickly, then look at a cruiser or chopper, the front end is raked out so that it'll practically ride it's self down a long stretch, I do that sometimes on a long ride, just set the throttle lock and take my hands off the bars, sit back and enjoy the view... but there's no way I'd even try to go around the twisties on my Harley the same way I can on my Buell. There's no way I could just lock the throttle on my Buell and sit back with no hands on the bars either.
Each bike has it's own purpose and as long as you don't ask one bike to do what the other can do, they're both perfectly safe.