Whenever a game is going on say football, you always hear such individuals question the coach's line up and tactics, you hear questions like -
-Why is he (the coach) not playing player xyz?
-why did he (the coach) use player xyz instead of players zyx?
-why is he (that is the coach) using this formation instead the other one? and so on.
-Is there a possibility that spectators of a sport like you and i with no professional training can develop a better understanding of a sport than some professional coaches of some teams?
Probably they know better but they cant do it on the playground.