None of this is surprising, apart from again the stupidity of labelling WWC as non-college educated.
It really is EXTREMELY antiquated. It might have been a valuable measuring stick back in the '50s, '60s, '70s, '80s and even '90s, but as Millenials have gotten older and Greatest Generation folks have died off, having a college degree has gone from an indicator of relatively high social status to something that a lot of struggling, WORKING CLASS people have.
It still says
something about class. I.e. It helps capture the difference between a tradesman making $70k and the social worker making $30k, but yes it is increasingly useless as a proxy for class.