All cert agencies recomend not running out of air in the first place.
Perhaps you were out that day?
Sure they do. Driving schools also recommend not having a car accident. What is your point? Everyone agrees that having a car accident is a bad idea. Does this mean we shouldn't wear seat belts? There are driving schools specialized for safety. How to be a safer driver. Yet even if you are successful graduate of one and in 20 years of driving you did not have a single car accident it is still prudent to wear your seat belt.