Specialist Coaches

Just watching Atletico & they almost score from set pieces v Barca. Set pieces are one of the main reasons they are successful in Spain. And they are very much like an English team, at set pieces.
I was wondering why a club the size of City for example, leaves this kind of stuff to the manager. It is for the most part, totally seperate to the playing style of the team; a passing, possession based team could still score 14 goals from corners and be a passing possession based team. Obviously the average size of the players is a factor but even so, why isn't there a bloke, who is purely there to teach the players ways & means of scoring from corners etc ?
We have goalkeeping coaches, a seperate academy coaching system; why not specialist set piece coaches etc ?
Cricket has nowhere near the money of football, yet they have specialist coaches for the different jobs; these guys analyse every movement & the whole biomechanics of it. We have people in football hitting the first man at corner kicks, every team, every game. Often the team that wins the league takes a load of key points from set piece goals.
For all the money they get, & all the money spent on football science & statistics, they are still missing loads of tricks which would almost guarantee improvement imo.
It's not the most progressive of sports really.
I was wondering why a club the size of City for example, leaves this kind of stuff to the manager. It is for the most part, totally seperate to the playing style of the team; a passing, possession based team could still score 14 goals from corners and be a passing possession based team. Obviously the average size of the players is a factor but even so, why isn't there a bloke, who is purely there to teach the players ways & means of scoring from corners etc ?
We have goalkeeping coaches, a seperate academy coaching system; why not specialist set piece coaches etc ?
Cricket has nowhere near the money of football, yet they have specialist coaches for the different jobs; these guys analyse every movement & the whole biomechanics of it. We have people in football hitting the first man at corner kicks, every team, every game. Often the team that wins the league takes a load of key points from set piece goals.
For all the money they get, & all the money spent on football science & statistics, they are still missing loads of tricks which would almost guarantee improvement imo.
It's not the most progressive of sports really.