I haven't said to ignore the stats have I? but they're floored, they don't take into account variables like quality of opposition players, How they set up to play, how you set up to play, teams you haven't played etc. Playing a team like Tranmere will give you far different stats to playing a team like us or Sunderland. Stats won't tell you that you played against the worst performing teams but were injured when you had to play 8 out of the top 10.
Re; the last sentence, If you want to use stats then you need to break it down more, pointless putting a pass that leads to a 60 yard hopeful shot on target, and a killer ball that your striker blazes over from 5 yards lumped in together.