While you are partially right, you are not looking hard enough or deep enough. What you are missing is the very small percentage of what are genuine gall stones that lay hidden among or even inside of the green stones. These are usually smaller grayish looking stones and are the ones that will eventually cause problems if not already doing so.
I do agree that things can be over done and that sometimes, a rest from the routine can be beneficial.
But the best part of this is the cholesterol that is being removed, but only if your cholesterol is too high.