Basically if you don’t eat enough good fats you’ll
  eat bad fats, and if you don’t eat enough bad fats
  you’ll eat sugar or carbs. So you want to make it easy
  for yourself to eat good fats, and then round out the
  rest of your diet with other stuff.

This seems so intuitive for some reason but have you come across any reading to suggest that this is indeed the case.

Any large study or trial?

Have you observed this first-person, anecdotally atleast in someone, over a sizable period of time?