Why is Autism considerd a disorder?

I understand that an autism diagnosis is only given when a person is considered to be disabled by their autistic traits, so I looked up the definition of disabled.

A disability according to the UK equality act is an impairment that has a long term adverse effect on your ability to do normal day to day activities. It doesn't have to stop you doing things completely, just makes them harder - for example if someone cannot go to the shops alone or has problems socialising. 

People who have type 1 insulin dependent diabetes are considered disabled, because they cannot live healthy lives without insulin. Modern society doesn't make them disabled. But I feel that most of the disability experienced by autistic people is caused by society disabling them.

For example:

Sensory issues - would these be a problem if we lived in a more primitive way amongst the sounds of nature? With clothes made from soft cotton or furs and no stitched on tags?

Trouble socialising - would that exist if we lived in extended family groups or tribes where we felt secure and could contribute with our specialist skills - maybe pottery making or animal tracking?

Trouble with executive function - is that due to the stresses of modern society and having to remember so much stuff like passwords?

Trouble going to the shops alone - in a primitive society there were no shops and everyone went to places in groups for security.

Any other ideas?

I agree, but for example the inability to read expressions may lead to being abused. I’m not gonna share what kind of hell I went through, but I guess I would be more likely to save myself from that if I could interact with others on a neurotypical level. I fell into that trap also because of being so lonely I craving connections that combined with poor social skills had a really tragic outcome. So I would have to add, I wouldn’t be disabled if other people don’t lie and are not malicious. I can’t be 100% sure that it’s due to autism although both therapist and me suspect that, I’m much more vulnerable than NTs. 

Yeah that is a good point. There have been many times when I've misinterpreted people's intentions, especially at work. They test you on how far you'll go with things and use you as a performance. They did that to me at work, cleaning the floor, toilets, all the crap jobs while they sat around laughing behind my back. And yes, there have been situations that could've led to far worse than that.

Yeah that is a good point. There have been many times when I've misinterpreted people's intentions, especially at work. They test you on how far you'll go with things and use you as a performance. They did that to me at work, cleaning the floor, toilets, all the crap jobs while they sat around laughing behind my back. And yes, there have been situations that could've led to far worse than that.