I was under the impression that a scout is supposed to uncover previously unknown/unheralded talent that should be able to fit into a team's chosen system. I do not believe that our first-team scouts have been good at this at all. Think of the players we have been linked with that other teams have bought but because they played in a non-top-four country, they get overlooked until they play a season in England.
Hypothetical question: Messi or Ronaldo get transfer listed. Would you really send scouts to watch them? Of course you wouldn't, cos it's not necessary.