Anyway, I firmly disagree. Self acceptance knowing you are wired differently and understanding aspects like Theory of Mind are a great opportunity to better function. The earlier the person learns to deal with these fundamentals (with which they likely WILL face issues with including in early childhood), the better.
Case in point: my 5 y.o. daughter just does not read her little brother's social cues. She cannot fathom he does not want X or Y.
I explain her needs and desires do not necessarily align with his and that she must try to notice his (I describe them like do you hear he is yelling because of XYZ). This is largely futile. Because she notices he yells but doesn't understand why. He's only 3, so he mostly plays parallel (normal for his age).
I also describe the circumstances of the situation. Usually it is before dinnertime. So I explain right before dinner isn't a good time to play together. Because they trigger each other. So it is a good time to play solo and respect each other's boundaries. At that time they're hangry and difficult, so often some drama isn't avoidable.
Unfortunately some triggers cannot be avoided. They have to go bath sometimes, and we settled for once a week. He hates to wash his hair. Our daughter had same, as did I.
That she is not an expert socializer at five years old does not indicate shes autistic. There are tens of thousands of confounding variables.
Until I knew I had a brain injury, I could not figure out how to work around my issues. Everything I tried was a dead end. It was unrelenting failure and judgement.
Knowing what a problem is gives you the ability to solve it. Not everyone will use that knowledge to their benefit, but withholding the knowledge from someone is abusive.
I was surprised by this when in my high school class the teacher (a doctor) asked the students if they would like to be accutely aware of an unfixable chronic brain impairment (if i recall it was memory impairment in this case). To my horror almost everyone said no.
At the end of the day, self acceptance must come with or without diagnosis.