I’ve only been on here a short while, so I don’t know what exactly has been discussed before.
There is often an overlap between Aspergers and introversion, amongst many other traits.
AS is on a sliding scale, or spectrum, within the sliding scale of human traits, as is the Introvert/Extrovert sliding scale. People who have AS are much more likely to be on the Introvert end of the scale too, so someone with AS is likely to be an introvert, but an Introvert does not necessarily have AS.
I think that SBC does not want to get sidetracked, with traits that are not part of diagnosis and research.
There are a number of other potential reasons for work issues, but again, often those with AS and/or Introvert tendencies are going to find these situations harder to deal with.