One nuance you might have failed to capture in your characterization of the article is that a lot of the cost is high when the subject is a beginner on the technique. The point is that as you gain mastery it becomes easier, thus encouraging people who are interested in the technique not to give up so fast.

In particular one side-effect of being a beginner is that one spends a lot of mental energy on the technique, leaving less room to focus on other important aspects. That gets better with time.