AFMA is a solution in search of a problem for most lenses. Unless you know exactly what you are trying to "fix" you are far more like to make AF worse. I think Canon includes this "feature" because they know compulsive camera tinkerers love it. The idea that every lens needs to be "calibrated" with AFMA is not supported by my experience.
I find that about half of my lenses benefit by AFMA, I've checked dozens over the years. I was among the first to pre-order Focal. It will show you when your lens is not focusing accurately.
Canon included it because it saved them money. Rather than have people shipping their lens back for adjustment, they can do it themselves. It was first offered on 1 series cameras.
The recent "L" lenses like the 24-70mm L II and 70-200mm L II as well as my 100-400mm L II seem to be more accurate, but the 24-70 needed about 5 points. Lenses like my 35mm L needed 17 points, so I sent it to Canon and it came back perfect. Some like my 100mm L need 10 pts which is borderline, so I use it with the AFMA adjustment. I bought a Sigma 15-30mm f/1.8, it was way off, and unfortunately, the camera I intended to use it with did not have AFMA, so it was trial and error to get it reasonably close using their dock.
Third party lenses benefit the most, because they don't emulate Canon's protocol perfectly and AF accuracy can vary based on the body. They can be adjusted with a dock in many cases, but only if you know how to set them, and AFMA is needed to do that unless you want to do hundreds of trial and error tests.