I think the medical community has been trying to correct the myth that vaccines cause autism for quite a while. If people prefer to believe something that's wrong (that X Vaccine caused Timmy to have autism) then they can continue to live in their ignorance. Autism tends to become noticeable around the same time as vaccines, but that doesn't mean that vaccines cause autism.
Tell that to the thousands of parents who had a healthy child that became autistic after the child received the X VACCINE.
Like I said, you have no children, right? If you did, you would have a different mindset.