FFS it's not the police's responsibility or the prosecution's responsibility to 'prove' he was drunk. Their responsiblity started and ended with an allegation of sexual assault.
Gallop responded and suspended Stewart due to him being ejected from Manly's season launch after prior being refused service. How many times do Manly fans need to be explained that. Yes it was over the top. Yes he wouldn't have been punished if the situation hadn't drawn media interest due to a criminal charge being layed. Just get over it already.
While it wasn't the police's or prosecution's responsibility to prove Brett was drunk, that was the angle the prosecution tried to go with because otherwise the assault would be so out of character. Ie. they wanted to show that he was drunk so that he wasn't in full control of his actions which is why the assault happened. Unfortunately for them they couldn't prove this as there were many witnesses gave evidence to the fact that he wasn't drunk.
Regardless you are right. Manly fans do have to let it go. I think Gallop knows he made a mistake with Brett, and hence the more leniency shown to Todd Carney and Benji. You can't argue that Gallop did the wrong thing and then insist he continue to make the same mistakes just for the sake of consistency.