The writing of history is .always controlled by the dominant class, which selects and interprets events according to its own successes and which sees history's goal, its telos, as the triumph of that class. This use of quotation, that is, the appropriation of elements from the dustbin of official historiogra- phy, is intended to destroy the credibility of those reigning historical accounts in favor of the point of view of that history's designated losers.
Still far too deterministic, history is not "always." Popular imagination? Perhaps. True history? No. You can absolutely parse out information from a "victors" history, and while it will not be completely accurate, those interpretations are vital in order to actually gain historical context. Highly contentious periods that really do only have one or two historical accounts on an isolated matter (specifically ancient world accounts, as literacy was scarce and those writing at times were exclusively kings whose words have survived) are really only taken into the "historical record" when archeology or anthropology can agree with it. The discipline is not simple; it is an active and breathing field that is not so easy to write off.