Hi longarekal.
Your passionate view is well-made and understood, making a good deal of sense.
On the other hand, anything that encourages people to sit down and even look at words of Torah, as well as bringing people to take on Daf Yomi, who might otherwise procrastinate their learning, has merits.
The depth of one’s understanding would be the responsibility of each person.
It would be difficult to measure just what is and is not gleaned by learning Daf Yomi. Certainly, a lot of ground is covered.
What is better? Learning a few things deeply, or learning many things, and covering more ground with a moderate understanding of those things?