They're beatable, every side is, but for me it's just about playing the odds. You go balls to the wall for a result against City, probably fail, then you're exhausted for an otherwise very winnable game against West Ham.
Some squads at the top end of the table can rotate the odd one or two players fairly consistently as they have actual squads. We don't. So where we have a game to rest the likes of Doucoure and DCL, ever presents in our side basically even if it means throwing the game, it's ultimately for the greater good IMO.