I don't think anyone has to explain shit to you when you can argue against the signing of a top class striker to replace RVP last season. Makes no sense that you can acknowledge Arteta's contribution to the team but at the same time brush aside RVP's by simply looking at our league position.
is he better at creating attacks and scoring then someone like jack or cazorla? no. are jack and cazorla better at being defensive then arteta? no. therefore you play them so the two players better at attack, attack. the player better at defending, defends. its not rocket science.
and he clearly is good at it. season before we were poor defensively with him and song there. you play just arteta there and we improve. its not just down to arteta, the defence got devolped too but you cant over look it