This is not necessarily a contradiction. While it is APPROVED for use (shown to be effective and no significant side effects,) that does not necessarily mean it is NEEDED.

Gardasil vaccine for HPV is APPROVED to the age of 9, hopefully not that many of my patients NEED it at that age (sexually transmitted.)

Wendell
Pediatrician in Chicago

The patient's expectation is that you have all the answers, sometimes they just don't like the answer you have for them