Success is often unrelated to quality, for many different definitions of the two.
There are many successfully products/services which are less than mediocre - useless, when they are not a burden for its users.
They are examples of the wrong assumptions in rational choice theory. There is hope that a different approach, like neuroeconomics, will shed some light on human decision making process. Unfortunately I fear this, again, will used against to, and not in favor of, users/consumers/citizens/"the general public".
Of course, the statement "the best best practice is success" is true, if you understand it in their psychological context: it is best for themselves, regardless of the pain and expense to others.