I worked in sales for a few years when I was younger before I started my actual career, I went from an introvert afraid of public speaking to completely comfortable breaking the ice with basically anyone in those years (mostly because I liked having four walls and a roof) and that led to me doing technical training/talks to strangers years later.
I still don't really like it but I also realised that dragons don't appear from portals and eat you immediately if you do it.
My missus is much like I was but she never got through it, she finds it fascinating that I can.
I also had a sales job at uni, just selling windows. But it was great for making me much more socially competent. Highly recommend.
The social model of diability is great in some ways (encouraging activism), but the idea that everything needs to be changed to be "designed for" people with disabilities has its downsides. Not all disabilities can be overcome, but to the extent that some can (at least partly), often IMO it's a good thing to have an expectation that most people can deal with the real world.