I'm not even joking when I say that the creator of this framework should consider going into marketing or sales. It's pretty impressive that he managed to take a framework that violates so many semantic HTML principles that it seems like it's being done on purpose, have the audacity to then call it "Semantic UI," and actually have it get some level of traction.
It's like if someone took a bunch of iron beams, claimed that they were actually 100% natural wood, and managed to get a bunch of people to buy them.