I think though it's a case of time changing with language to a certain extent.
One of mine has bad anxiety. However I can recognise a lot of the traits in me too. My dm used to say I was "highly strung".
So I think the difference is that for me it was just considered part of my personality, and I had to get on with it. For my dc it's considered a extra need.
Is this helpful? Sometimes. When dd is really stressing out about something, then to say to her teachers that her anxiety is high, means they listen and usually try to help. It means that I, and others, can recognise that sometimes it's out of her and our control to be able to cope with it.
Sometimes though, it can be used (and I've seen dd do this) as a get out clause. "I can't do it, I have anxiety". It's easier at the time for dd to say she can't do it because of her anxiety, than give it a go.
I know from experience from both me and from her, that if she can be persuaded to give it a go, then doing it and succeeding (which she almost always has if she's tried) helps the anxiety far more than any other help does. She managed it. She will probably do it again next time, still nervous, but without being pushed.