On a subject such as this, I'd believe my own, or my family members experience which I've had at first hand, before the findings you've posted that are full of averages."My family sayz so, so it must be true!"
vs
"Well here's what the A.M.A. and other scientific organizations say on the matter" Hmm.. which is more believable... I wonder...
And anyway he never said anything like 'My family said so, so it must be true', he said he had experience, and that his experience differed to the figures you except to be true; he never said IIRC that your figures were wrong, just different. Yet you claim you've proved him wrong?? You can prove somebody else's experiences are wrong because they don't match the average of the statistics you've read?