Can't believe I am wading into this, but here goes!
As far as "legit" classes, who is to say what is and isn't "legit"? The school? NCAA? Some fan on a message board? If you are saying that the AFAM classes (or electives or any other classes offered) are/were somehow set up to provide SPECIFIC cover for athletes too stupid to sign their names, then your argument is invalid. Those classes WERE approved by the school and the NCAA, as much as they might like to think they can, cannot control what ANY school offers in the way of classes, nor can they do or say anything about how rigorous they are. All they can do is say that ATHLETES have to take legitimate classes offered at their school and those classes have to be offered to everyone else. In the case of the AFAM classes, they were legitimate classes in UNC's eyes and were offered to everyone, not just athletes. It makes no difference if the professors teaching those classes say you have to write a 1 paragraph essay in crayon or do a 1000 page dissertation. The NCAA can't tell a university or it's faculty how to do a dang thing as it relates to academics.
As for the "well rounded" and "challenging" part, well who is to say what is "well rounded" and "challenging"? When I was a senior in college I had ONE class required to graduate my last semester, but needed 12 hours to stay in my dorm. So (showing my age here!) I took: canoeing, archery and gun handling along with that one required class. Canoeing was a breeze since I practically lived on the water growing up (dad owned a canoe shop) and I have hunted all my life, too. Had my own bow and we shot at targets for the entire class. The "gun handling" class (yes, that WAS an actual class at WCU back in the day) amounted to shooting skeet and reloading the spent shotgun shells. I could do both bindfolded. Brought my own shotgun, too. (Had to leave it in the safe at campus security). Were those "legit" classes? Yes they were. The school said so. Were they "challenging"? Not for me, but several people struggled with them. In canoeing we had to navigate certain rapids and do some basic stuff covered in the same 30 minute briefing given at any outfitter. Archery was hitting a target a minimum number of times. Same with shooting skeet. To say those were "challenging" for me would be like saying dunking on a nerf goal would be challenging for Kennedy Meeks.