Except, it's treated all the time without doing that. I'm not sure how the specifics are even relevant, since people are talking about whether 'curing' autism is inherently good or bad, and not silliness like 'if 1 in 20000 people get a negative side effect it sucks'. Amusingly, not all autistic people have the symptoms you describe, and most higher-functioning individuals have no trouble speaking or recognising people.
Symptoms can be treated, the co-morbid conditions that manifest as a result of the underlying condition. There is no effective treatment for the underlying autism, just ways of dealing with the side effects. Depression, anxiety, seizures in some cases etc. And no, not all autistic people have those symptoms, that is why I linked to an overview of autism and what is going on in the brain earlier. Apparently you never clicked it. There are several different regions of the brain that are affected, I selected a few examples. Would you like a comprehensive list, or were you being deliberately obtuse?
Wait, so when you're addicted to something and your brain needs it, getting over it is fine. When your brain chemistry is wrong, adjusting it is a complete brain rewire that kills you and replaces you with a doppleganger.
This. This right here. It is proof that you do not read your opponents arguments. I have not argued, and if you were in any way literate you would know this, that changing neurochemistry is a brain rewire. If you could read, you would notice that I made a distinction between the physical connections in the brain, and the neurotransmitters/hormones that regulate mood and some behaviors. What? Do you think the brain is just a sack of chemicals? Have you heard of neurons, and how their aggregate structures and connections are responsible for the core processes of the brain? Go crack open a book sometime. I know it hurts.
And before you nitpick, yes, neurotransmitters are what gets information across a synaptic gap. However they are not what processes the information, they are just the means of transmittance. Something that is mood altering like serotonin is itself information, and a defect in serotonin reuptake alters the information the neurons get. The processing of that information occurs normally.
Are you just saying that any change to a 'default condition' is fine? Since autism can be developmental - with symptoms worsening around puberty - surely 'curing' it is simply restoring a default condition and thus acceptable?
No. If you could read, you would notice that distinction I made above.
Neurotransmitters in the brain are regulated by a variety of positive and negative feedback loops. Cocaine blocks re-uptake of one of them, and shuts down production of that same neurotransmitter as a result. As a result, when you go off cocaine, you have to wait a while until it completely leaves your system, and your brain ramps up production again. Even when you do not use cocaine, there are times your brain down-regulates production of dopamine. That regulatory pathway is very very dynamic, and it is meant to be.
Brain structure is somewhat less so, and while it does change (particularly the parts of the brain responsible for behavioral control and higher level cognition) as one ages, the pathways for the basic functions do not. Those basic functions are what are affected by Autism, in its various forms, and changing them amounts to broad scale brain rewiring, and the consequences of that in terms of personality could be far greater than just getting rid of Autism.
Can a person circumvent many of these problems through higher level cognition? Yes. Yes they can. I learned for example how not to walk like a vulture. I also manually learned to consciously control how much eye contact I give. I do however when my guard drops still go into my autistic little world and stare for 15 minutes at the movement of a blade of grass, a frog breathing, fidget with objects and run my hands over interestingly textured surfaces. These are things that certain parts of my brain want to do all the time, but that my frontal lobe cognitively vetoes.