The message is simple - great players know how to play, all you gotta do is convince them that a certain approach for a given game is the right one. Result varies only based on coach's judgement of the game, which is the reason Zidane does make mistakes and is arguably guilty of nepotism (Benzema, Isco, Vazquez, CKM in 2017/18). It's hit or miss, but when it hits, it really hits and when it misses, it doesn't actually (yet) miss very terribly. Only handful of times he's really had his ass handed to him and not only by way of misjudging the game i.e. December Clasico 2017, Wolfsburg 2016, Juventus @ Bernabeu 2018. Otherwise he's got an incredible record of judgement calls, both for matches and for players. It's a testament of his football mind when he can make an underperforming team still turn up for CL with a right approach almost 100% of the time.