I read an article about how Wesley So hired a coach. Well, Wesley is rated 2800 and is far stronger than his coach ever was. I'm just wondering what a coach would have to offer to a player as strong as Wesley, and if it's really worth the money.
In physical sports, coaches can provide plans. For example, in tennis, Nadal is a great player. His coach can give him plans so that Nadal can go out and execute them. The reason Nadal is better than his coach is because he can execute the plan.
But, in chess, the plan is the sport. If Wesley So's coach can make better plans than Wesley So, why isn't he a better player than Wesley ?