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It seems you don't understand the quote you are trying to localize to this particular situtation. "The victors write history" is a dumb thing to say IMO with relation to Battlemaster, because in real life the losers were dead or lacking power to write history. In BM, even if they are dead they can edit the wiki but considering death is only optional (deleting characters) except for hero's, they can still counter anything IG so long as they hear about it, which applied before the conflict as well thus being victor in BM has no effects on who writes history.
Alternate versions can exist in real life too. The American Civil War is an example.
You also misunderstand the quote. For nearly ANY history there will be some % that believe "alternate" versions. Thus when they refer to "writing history" they refer to the History as accepted by the vast majority of people.
Does that mean that some people don't believe the movie Independence Day is factually correct?
Oh, how many had thought that this war would be over by now... Yet the conflict is still brewing, far from over.Wonderful times!
Oh come on, it's almost over.