The OP's mistake is to characterize all "moral facts" as simple binary answers. Cheating = bad. Killing = wrong. Those are too simple. That they are labeled opinion does not imply that there aren't any not-simple moral facts.

"Cheating undermines meritocracies and is therefor frowned upon by those in control of such."

I'd say that qualifies as a moral fact and most all would call it an accurate description of a state of affairs, a fact.

"All men are created equal" is not a fact, or even an opinion imho. It is a hope, a dream of people trying to describe an ideal state of affairs. That it isn't a "fact" doesn't mean that it cannot be something to believe in and strive for.