Although dentists failed to become real doctors that they actually set out to become when they were in high school, they do have some reactionary ability. So now you see dentists giving you various options on how to reduce pain completely. This is their effort to prevent customers from running away.
It is not altogether surprising to note that they've changed the syllabus in the dentistry course. They now have a course called "How to avoid being a poor dentist". Controlling this "fear factor" must be the third lesson after precious old gems such as, "you need to clean your teeth professionally" and "you need your wisdom tooth removed, otherwise it will lead to abscess".