It's precisely because of the anguish, uncertainty and argument caused by Wakefield's work that clinicians have to conform to strict practice guidelines for research and publication. Like free speech, there should be no taboos on research. However, also like free speech, that does not extend to shouting 'fire' in a crowded room and hang the consequences.
Autism affected a lot of children pre MMR and continues to do so. If they are being overlooked it could be because people are wasting time arguing about one flawed theory rather than investigating the problem more fully.