There's a few problems with that argument. First, Ozzy's whack happened before the horn, while Ribeiro's chop happened after. Second, Ribeiro picked up a match penalty (which automatically kicks the issue to Toronto) while Ozzy didn't even get 2 minutes. Last, if you're going to hammer Ozzy for his unpenalized whack, then that opens the door for hammering Turco for his unpenalized punches to Homer's head.
I'm betting Ribeiro gets a hefty fine, Ozzy gets a small fine, and Turco gets a quiet finger-wag. Dallas can't cry about losing a star, Dallas can't cry about Ozzy getting a free pass, Detroit can't cry about Ribby getting a free pass. The media can't cry too much about conspiracies or (at the other end of the spectrum) shameful inaction. It's the cleanest way for the league to extract themselves from the cowpie.