Those who learn daf yomi have learned many years in yeshiva and kollel but continue to learn post yeshiva, which also includes daf yomi.
But some people like to complain all the time and find issues with anything that’s good. Oh, was I just quoting an anti-semite?
But, it seems that longarekel is right and thousands of Rabbonim and Poskim who are involved in daf yomi are wrong.