I’m neither agreeing, or disagreeing. But consider that there is often a contrary argument, often a louder and more voluminous constituency than those advocating for more and longer training, for example, here. Requiring costly compliance has not been a popular position for the Federal government since about January 20, 1981.
Consider also longer courses are more expensive, and many mariners look first at the cost of training and may shop for the cheapest. For example, this guy.