"Amish and their lack of autism"
one reason could be they don't bother diagnosing it, another is that it is mainly genetic and so they only breed in their own groups.
" the experts "
you trust the experts to build the operating system your computer runs on. You trust the " the experts " to keep your credit card information safe, you trust " the experts " to keep you safe from robberies, you trust " the experts " to keep your electricity running and the wiring in your house safe.
there have been thousands upon thousands of studies proving they are safe.