I have no doubt about how badly "the uninitiated" can mess up a machine with a screen reader on it for the person who actually uses that machine.
I'm the only local tech, that I know of, that has a built-in level of trust in the screen reader user community when it comes to fixing computers simply because I don't mess them up. And that came about from years of helping out a dear friend, now deceased, who taught me at the beginning what to avoid and why. I learned as much from her about the nuances necessary for working on a computer that belonged to a screen reader user as I learned in a number of other technical training courses. After I had it all nailed down, I became the only person, other than herself, that she ever allowed to touch her computers unsupervised. She'd also feel free to call me on the very rare occcasion where there was a major accessiblity stumbling block, as sometimes I could solve it, and other times I could confirm it could not be solved, and she had a much better way to make her case when raising a stink about it (which she always took the time to do, much to her credit).
Brian - Windows 10, 64-Bit, Version 21H1, Build 19043
The difference between a top-flight creative man and the hack is his ability to express powerful meanings indirectly.
~ Vance Packard