OK, but different levels of evidence exist in all cases of wrongdoing. And that affects verdicts and sentencing even for substantially the same act. Details of laws (there are often 5 levels of sexual assault on the books) and their corresponding sentences often depend on very fine grained reading of the available evidence.
So is that what disturbs you, or the fact that the League believed this was a "both sides are to blame and a slap isn't really a punch" incident that is domestic violence incident only in the technical sense?
Or is it my particular brand of exasperation, that Goodell seems to pick punishments out of a hat after reading USAToday?