I gotta disagree on this one for numerous reasons. A large majority of daf yomi learners work full time and have very little extra free time, that one hour a day of torah that their learning is a tremendous source of chizuk for them. Not everyone is made to sit and learn gemera in depth and some people just want that sense of learning every day.
Daf Yomi serves more then just “creating achdus for klal yisroel”, it is the sole source of learning for tens of thousands. Of course its easy to say that its never enough and people should do more, but think about how many of the daf yomi people wouldnt learn at all if not for their daily daf. This is their connection.
Additionally people in fact do become more learned by learning daf yomi, they obviously dont remember everything but trust me from personal experience they know a lot more then they had before.
Im not saying that people shouldnt learn halacha lemaisah, but dont be so quick to discredit the daf your just putting down a positive behavior.
If you truly feel the way you do, maybe start a halacha yomi shuir (or something of the sort) but please dont put down something which is such an integral part of many frum jews lives