I don't agree, and I don't think anyone who regularly rides road bike on streets in any sort of conditions would agree either. The frames are sturdy, fine, and aren't going to break from anything short of going off several-foot high jumps and slamming onto the ground - even then the frame would probably be fine, it's the wheel that would bust. They're designed to be ridden on the road. They're also designed, as I mentioned, to handle the kind of forces that racers exert on them while pedaling full out - can you imagine the kind of force Lance Armstrong or whoever can generate while sprinting towards the finish line? Or screaming down the side of a mountain at 40-60mph? They're not "delicate flowers" who "have to be ridden in pristine conditions".