Go to a tour event sometime and take a look at the perfect divots of tour pros. A divot is evidence of a solidly struck golf shot. The more in to out (drawer) of the ball the less the divot. The more you play a cut generally the more divot you will take.
Optimum Trackman data tells us an ideal iron shot has a path of 2 left and a downward angle of attack. Those numbers would most certainly produce a divot. In the old days (pre video) all you had was the divot, the sound, and the ball flight. Ben Hogan famously said “your swing is in the dirt go find it!” Further evidence that a divot is absolutely essential to consistent iron play!