There is more to ice climbing than just finding a frozen waterfall, strapping on crampons and sinking in a pair of ice tools. You have to worry about things falling down all the time, and ice routes are often fed by avalanche gullies. What Bishop was telling me was that without formal training and an understanding of the sport, it is very dangerous, even to the point of people dying. He knew better, but didn't use good judgment and he was killed. That little fact made me appreciate being on the ice at 9 in the morning.
Gear is also a factor.
Proper gear will help ensure safety and success. And proper clothing will keep you from falling prey to the elements. The two most important things are gear and conditions. According to Bishop, ice also requires a different mindset than regular rock climbing. Ice takes a longer time to work.