Because it's a straw man's argument just to look at stats. You just have to watch him play to realise that Luis has superior offensive ability and technique compared to Azpi and Ivanovic and has proven so over his career. He's a much better dribbler than both, superior composure when it comes to tight spaces, a lot more comfortable on the ball, can actually go past his man and provides much better natural width than both. He was never used properly or given a real fair go here either. Whenever he did impress, i.e. in our 5-0 demolition against Swansea where he was one of our top performers and then performed well in the CC semis against Liverpool, he never got consecutive game time following that up. Or when we drew 1-1 against Burnley, I think he was the best player on the pitch by far (alongside Eden) for us when a lot of other players were very lacklustre. Consequence? Gets dropped. You literally just have to watch us when Luis plays and see how much more fluid we are on that left hand side and how much better he links up with Hazard to understand what he actually brings to the table.