If this trend is real it will be really good for social mobility.
The economy has been a zero sum game for the majority for a very long time, so zero sum game strategies is what they employ.
The trend I’ve noticed is that the more senior of a role we interview for the less and less we even look at their education. Much more comes from their work history.
While the study is possibly applicable to the jobs they studied (lawyer / business roles), I’m not sure it holds up in all sectors.