Monty is a "motivational speaker" type of coach. And that's all well and good, as there are contexts where that kind of coaching can be effective. But when it comes to actual strategy, that's where those types (and not coincidentally, Monty) are often lacking.
It can still work if they have highly effective assistants making the difference (i.e, Green). But otherwise, the motivational stuff eventually wears thin, and players often become disenchanted and demotivated. And compounding the problem, the motivational type coach usually has a very fixed "my way or the highway" approach that further alienates the players.
I see it all the time in various sports, and at various levels... although it tends to be least problematic at the amateur levels where players don't have as much control over the team's fortunes as a whole as at the pro level.