I think the main fear is that the (assumed) increase of productivity means that employers may require less employees, resulting to less positions in the market. But I don't think that expertise is no longer relevant or we see getting more people hired with less expertise because AI. If anything, there is this talk about companies not hiring junior engineers as much. Moreover, as getting the expertise could become harder, it could become more of a moat.
> require less employees, resulting to less positions in the market
which i counter with the idea that more efficiency means more output for less - ala, more surplus. This extra surplus drives higher demand for more products/services.
It's the same idea as economic resource becoming cheaper leading to a higher usage of it: namely, Jevons paradox.