This is true for ‘good’ and ‘bad’ moves. When you see one, chances are there will be many more by that individual. You want to learn about and capitalize on the positives and learn about and avoid the negatives. That way, you can remain efficient and safe, as well as help others stay efficient and safe.
This is also an excellent self-awareness tool. By asking yourself if/how much of the good/bad technique you do, you can better advance your own skills.