I know that there are practical methods of playing for a win with White without bothering with an opening advantage. In Kasparov's multivolume work on his predecessors Bent Larsen is described as someone who excelled at building complex playable positions without attention to opening advantage. It was enough for him that the position held enough complexity to make for a hard battle.
Presumably, this kind of playing is easier than fighting for an advantage. My question is about the reason why opening books focus only on finding an advantage for white rather than make life simipler for the reader and show how to obtain a good promising position with equal chances using the White pieces as a means of forcing one's will.
In my earlier question in this vein there was a lot of controversy over the value of winning versus drawing, which I find amazing because people don't seem to value draw as an outcome of a game of chess. So here I ask a similar question that is focused on winning rather than drawing but without fighting for the so called opening advantage. Compare Advice on how to draw with White