Ah, well, I'm an historian by training and background. To me, the whole point of anything which claims to be a biography is something approaching accuracy....otherwise, it is simply a creative re-interpretation of the sort that goes by the name of fiction, or historical fiction.
Actually, unlike many others who once dwelt in the groves of academe, I have no quarrel with historical fiction, or, indeed, any other kind of fiction. Just don't try to pass it off as fact, least of all historical fact....