But eventually, won't it be part of the culture everywhere? It's too much responsibility for the manager to carry (and do so competently) in the modern game.
I don't know. We've got better technology now and scouts can do things that even ten years ago would've been seen as science fiction. Maybe automation and algorithms is the answer. (Though I personally hope not.) Maybe managers could be successful by staying hands-on with recruitment and delegating more of the coaching and preparation work. (Ferguson did this pretty well.)
I genuinely have no idea.