I agree, and by the same logic it’s a waste of time to learn Mishnah B’rurah because it is spoon fed and superficial.
I have heard the complainers yapping about this for years and you know what, they don’t learn anything; not g’mara b’iyun and not shulchan aruch because they say that they will only learn the real deal, for which they have no time for.
But these complainers promise, when they have the time, it will be the real thing and not the daf or Mishnah B’rurah.
Daf Yomi is a daily comittment of learning. Yes, it’s best to also have other learning shiurim and most of us do. For so many of us, the daf give us an insight to the tens of thousands of concepts and links to the written Torah that we otherwise would never have, and that those who don’t learn the daf will never have.