Probably it would be better asked by someone who has autism, too - I might well be barking up the wrong argument tree.
On the other issue... I'm confused now. I'm not sure if this is a case of the connotation overwhelming the denotation, or what, but I initially took "correcting the lack of ability to communicate, irrespective of other cognitive function" to mean something like "installing an ability to communicate, no matter what that would do to other cognitive function". I still don't see what else it could mean, but your confusion as to why that would be taken as disrespectful seems to indicate there is something...?
No, I had something totally different in mind -- that enhancing the ability to communicate would be a good thing regardless of how strong the treated individual's other cognitive abilities might be. I was not suggesting that there should or must be any effect at all on those other abilities.
I ran across this article that I think is interesting. It suggests that type 2 diabetes and the increase in autism may have a common link
http://www.frontiersin.org/Cellular_Endocrinology/10.3389/fendo.2011.00054/full