Interesting question, Lau, and I do think parents can affect whether or not certain autistic traits "trip" into existence or not, but I see the hows and whys quite differently than you propose.
First of all, curabie parenting is exhausting. It is hardly less work. I think it is more ... or, well, at least different. It is very outward, looking to things outside of the personal relationships within the family for answers. Following the diet is a huge amount of work just by itself, requiring most meals be made entirely from scratch. Then there are the therapies, doctor visits, etc... I get exhausted just thinking about it.
And that is why I think it's bad for the kids, that approach. If thinking about it exhausts me. imagine what it does to the kids. AS kids prefer a simple life, as far as I can tell, full of structure, low on sensory input, low on stress. But at least the curabie program is high on structure. Trying to figure out what works in the program for some kids despite all that is an important question.
But there are other factors of common NT thinking that may contribute more to a "trip." I have begun to formulate that turning off certain interactions may be something a very young As child does subconsciously and in self-defense, much the way the immune system trips into allergies. So imagine NT parents introducing a baby to the world, and then a toddler, exposing the baby to every stimulation imaginable because it is supposed to help brain development. Baby seems interested; exposure increases. Picture a scene I saw last summer, with two preschoolers being put on a carnival ride by their mom. One is crying, doesn't want to go. Mom insists and turns to her friend, saying to that the child has to get used to this sort of thing or he'll miss out on life. Imagine an NT mom being that careless about the reactions of a child born AS. In defense, the AS child may eventually turn himself off in those situations, go inside his own world, won't he?
Just a theory.
_________________
Mom to an amazing young adult AS son, plus an also amazing non-AS daughter. Most likely part of the "Broader Autism Phenotype" (some traits).