Of course it would. Which is why this "therapy" is not only ineffective but also dangerous. However, it's ineffectiveness is a major key to its success: since the symptoms don't go away, the sellers can push more and more treatment. As I noted above, I think this cr*p is being sold almost exclusively to stay-at-home mothers, who lack the daily reality checks that interacting with a variety of sane adults in a workplace would deliver. There is nobody around to ask incredulously "You do WHAT to your child?" Stay-at-home mothers of seriously disturbed and/or neurologically impaired children naturally gravitate towards support groups and social networks consisting of people in similar situations. And if they fall in with a group that believes in this brand of quackery, its alleged legitimacy and benefits will be reinforced, not ridiculed, by the group.
"interacting with a variety of sane adults in a workplace would deliver"
I don't know where you work but I would avoid asking people where I work for advice about much of anything. Most of them don't qualify as "sane" IMHO. :)