So what's your definition of pilots "knowing what they're doing?" Have you ever flown in a buisy traffic environment? If your answer is yes, you would understand a collision flying VFR could happen very easily. If you have flown in a heavy traffic environment, you would understand that near mid air collisions happen on a daily basis. The FAA says your supposed to spend 90% of your time looking outside the cockpit. Do you spend 90% of your time looking outside? If you did you would never pass a check ride because you would never know what your heading or altitude was. Don't think that you are above anybody because you have not had an accident, consider yourself lucky.