Regarding the gap between "people who want to do X but feel excluded" and "people who are already doing X", there's a really tough-to-measure additional gap, be

Regarding the gap between "people who want to do X but feel excluded" and "people who are already doing X", there's a really tough-to-measure additional gap, between "people who want to do X", and "people who would want to do X, except they think it's not possible/allowed/acceptable for them". Those people may not even be consciously aware that they're omitting a field (such as CS) from consideration because "people like me don't do things like that". Even if there are a few "people like me" doing that thing, they may assume that only the most exceptional such people will be successful, so they don't even consider it as a possibility for themselves.