Has anyone ever claimed that they could be equated? Any statistically significant correlation is valuable, I don't know what you mean exactly. Of course, I'm not sure what it would be valuable for, really, since judging expected intelligence by education in isolation rarely comes up, especially since there is no real definition of intelligence.But the two can't be equated, which is the point. Greater intelligence might cause greater education, but not always, and not with a strong enough correlation to be useful from a statistical point of view.
If we're relating it to the other thread, if literally the only thing about someone that I knew was their education level, yes, I would have more baseline respect for the more educated one. By why in the world would I be judging my respect for someone I knew so little about?