I think they're more of a philosophical question than a fishkeeping one. They're a fish with no natural history, created for the hobby to sell. Right off, that makes them uninteresting to me, since there are so many more interesting, curious quirky Cichlids. At best, it's a bit like putting plastic flowers in a garden.
Some will get very passionate about hating them, and some really like them, so I figured I'd post to try to show moderation in my dislike of them. They are weird looking things, and they do have those faces. But they also have compressed, rounded bodies, as you know. This can cause some of the same physical problems that blood parrots suffer from as the intentionally deformed spine can compress the intestines. I believe they are banned as cruelty breeding in some areas, and I would support that. When a body shape chosen by a breeder causes active harm to the fish, that breeder doesn't get my money.
Choosing to breed fish that are unlike natural fish is one thing, but breeding them with harmful deformities crosses a line.
So by now, you see I think buying any is a bad idea...