I've always thought that you should be allowed to throw the ball any way at any time provided you stay behind the foul line. If I'm RH, and I'm talented enough to throw LH to pick up the 10-pin, I think I should be able to do it. If I can master traditional form, two-handed, no-thumb, etc., that's a credit to my coordination and/or athleticism, no? Sadly, I think it all comes down to attempts to limit bagging. USBC feels that if they allowed people to throw any way they wanted, you'd have people establishing low averages with one delivery only to switch to another and blow the doors off of people using another.