You can think of different football styles as differents areas of a multidimensional space. Depending on your players strength, an area is better suited for your team. But the thing is, each of those area has a local maxima.

You excelently described barcelona style circa 2010. But to play it and expect to win you need Iniesta AND Xavi BOTH. because you have to be able to take advantage of those 4 to 8 opportunities in a match against a top opponent. Those player must have the psychological strength to not flinch when the opportunity present itself, must have the technical ability to execute what they want and you need at least 2 of them if you want to pursue intelligently whatever tactical advantage you gain. In the spanish team you had iniesta, xavi and silva.

Those player are exceedingly rare and are not simply good technical players, the share a common understanding of the "chess game" they are playing . The danger is if you don't recognise you don't have those player, possession football puts you at a disadvantage against a team with offensive talent, organisation and defensive will ! ( think France 2018 )