I think it's a complete load of bull shit. In 1975 I went to school with kids who would be diagnosed with autism now, it was barely heard of then and those kids were just considered odd balls or loners. Fortunately now we know better and that is why diagnosis is going up and up as awareness goes up and up. Still though surprising numbers of teachers have very little clue.
As for being on a screen causing autism - what a load of absolute nonsense. If a doctor can't tell the difference between a child with autism and a child who spends too much time on screen then I would despair. Honestly we all know how addictive screen time can be - but I have a child with a diagnosis of Aspergers syndrome and he doesn't understand or think in the way an NT child does - no matter how long that NT child spent on a screen.
Romania is not somewhere I'd be going to look for the latest and best research on autism and as for the French father story - well do you know the views on autism in France? They are very far behind.
If the father had autistic traits and the child did, then what the father has done won't have cured the child. It will just have taught him how to behave more like an NT child. I spent a lot of time playing, reading etc with my child and as a result he could blend in at school - until he couldn't. He didn't get diagnosed until secondary age when the difference in emotional development really starts to show.
They keep talking about autistic 'symptoms' and I don't even understand that. Autism isn't a disease or an illness. My son doesn't have 'symptoms' he just processes the world in a different way to NT people. Honestly it's a complete load of twattish twaddle which encourages people to think ASD is just poor parenting. It's just bollox.