Imagine you have a brilliant friend. He's always full of great ideas. Unfortunately, this friend rarely brushes his teeth, never flosses, and showers only occasionally. So when he tries to implement his ideas, he struggles: Who would ever listen to someone so disheveled and gross? Your friend's lack of hygiene has rendered him an ineffective person.
There is a similar dynamic at play in organizations that put all their effort into strategy without first establishing basic operational hygiene.