Yeah there's some truth to this - I find that my Ed students don't always have sophisticated understandings of their content area (though honestly I find that ENGR and BIOL students don't, either). But they do get more content area teaching than in ED.

ED as a field is 100% all-in on AI, too, so there's a lot of discussion amongst them about what skills in the field need to be automated and what has to stay artisanal. But I'm sympathetic to zozbot's claims too - I do think the reading scores would be higher if there were more comp/rhet specialists in sec. ed.