As my Momma used to say, "If everyone decided to jump off a cliff would you do it too?" Knowledge is power, check out these web sites then make your own decision:
Bare Foot Horse
EasyCare Inc. | The Leader in Hoof Boots and Natural Hoof Care
How will you be riding your horse? If it's trail, stay bare and buy some boots.
Most disciplines can be trained for in boots, then remove them for the show. The only one I can think of where you need rear shoes is reining because of the sliders.