There are many more avenues for the non specialist to get a substantiated opinion. In this case, not just doctors, but the general press, scientific vulgarisati

There are many more avenues for the non specialist to get a substantiated opinion. In this case, not just doctors, but the general press, scientific vulgarisation sites and blogs, facts surrounding the publication (all the authors but one rejected the study) etc. It's the combination of all these factors - these "evidences" - and not just one, that should convince people.