Now you're just twisting my words. I didn't say those people are irrelevant at all - making things up doesn't help your credibility. I'm also not arguing that it's a difference rather than a disability (see my earlier comments in the thread).
Let's ignore the "self-diagnosed" part in there, that's nothing to do with what I'm saying.
You also seem to be conflating "unable to communicate" with "difficulty communicating"; there's a whole world of range in there.
But...ultimately, it comes down to this:
"I fail to see what...someone who is communication, articulate, doesn't require 24 hour care because of their needs etc has in common with someone who does"
That's the point. You can't see it, you can't understand it, and - more relevant - you don't seem to want to see it, because even when presented with information which would aid such an endeavour, you refuse to acknowledge it.
Ironically, the image that you posted earlier purporting to show the diagnostic creep actually shows the opposite (as shown if you read the actual definitions outside of that image) - the definition in the DSM 3 was very much more vague than it is in the latest version. It also never required a complete lack of communication, and the only true difference is that it didn't take into account masking. In fact, when it comes to communication, the DSM 3 specifically says this:
"the numbered items are arranged so that those first listed are more likely to apply to younger or more disabled, and the later ones, to older or less disabled"
The result is that almost everybody diagnosed today under the DSM 5 definition would've also been covered under the DSM 3 definition, had anybody bothered to properly examine it; the lower diagnosis rates from the time of the DSM 3 were a function of a) bias in the medical community whereby only the most obvious cases were ever diagnosed, and b) the effect of masking was largely unknown at the time. The fact that the DSM 5 contains far more specificity is simply a consequence of the fact that it exists to aid diagnosis.