There's an analogy between autism and other conditions, such as blindness.

Being blind means you can't see properly. But you might be blind for a whole range of different reasons; and there are degrees of blindness - some people can see the difference between light and dark, for example, and others cannot.

Yes, there are things in common between the life experience of blind people, and the things that can get in the way of that or can help - but talking in terms of a single cause for all blindness doesn't make much sense.

The same is true in relation to the life experience and the requirements of the different people with the label "autistic", and about talking in terms of a common cause for their being the way they are.