This is a personal reflection (I was diagnosed with Asperger’s syndrome) and I know this does not apply to all autistic people.
I agree it’s not a disorder, and I think it is a difference which can be beneficial for example logical thinking, practical problem solving, creativity. But due to world being structured for neurotypical people, that difference means we can become incapacitated in situations and neurotypical people just don’t understand why we possibly could be reacting the way we are. And we are unable to explain why, so we are seen to be acting strangely, inconsiderately, rudely or just plain awkward and the most awkward thing for me is it usually takes DAYS to work out why I reacted that way, if I do at all.
I seem to have a broken link between inner brain which is processing everything, and the bit which converts the “machine code” into comprehensible thought-language and then words that can be spoken and understood; I am unable to process what is happening around me, respond to it or articulate why I am thinking/reacting in this way and then I hate myself for not being able to do what neurotypicals do ie remain in control. (I realise I am generalising neurotypicals here of course). And that definitely is a disability.
So a disorder no, a difference yes - but one which can be positive, but it is also, for me, a disability due to these moments where life seems pretty intolerable, and I seem to be viewed as pretty intolerable too.