There may be some element of truth to that, but jobs aren’t the only reason why highly employable young people tend to move to urban areas. There’s other big reasons, like there being a lot more to things to do and a vastly wider variety of large hobby/interest communities and cultures in urban areas.

This is why the bulk of people moving away from city centers during the pandemic moved to cheaper cities or the suburban metros surrounding cities rather than small towns, and unless small towns stop being small towns it’s not going to change.