This is also anecdotal. I'm a female working as a technical lead. When trying to describe what I do to non-tech-worker female friends that ask, I often find that they get a look of slight confusion and state things such as "wait, that actually sounds like an interesting job!". It's as if their entire experience of computers, maths and tech is boring, so they think working with them must be as well.

I think how girls get introduced into STEM subjects has to change. I also think it would be worthwhile continuing to encourage adult females to give things like programming a go as well, even if they've tried in the past and didn't like it. Most of the barriers to interest seem to be how the subjects are talked about, as opposed to the subjects themselves.