The following is my understanding from Ajahn Brahm’s retreats.
That blocks the way to deeper meditation where one has to relinquish control then one can get deeper.
Control is nice for goal language, but method language wise it’s a wrong way. Goal language, externally speaking, we seem to be in control of our speech and actions thus be morally good. And able to get deep into meditation. Subjectively, in method language, one lets go of control and just put in the causes for the results. Result of deeper meditation is caused by letting go, including letting go of the will.
Morality wise, MN20 has first 4 method as wisdom power, and the last method as will power. Use wisdom power first, it’s better and one doesn’t need to use will power so often which is so much controlling.
Controlling mindset still thinks in terms of self, control the world, satisfied one’s wishes be happy. In terms of no self, method language, the world doesn’t work by what we wish for, but by causes and conditions, see the causes, plant the right one for our goal, and whether there’s an act of will or not, the results follows. In one of the suttas in AN11, morality is the cause for non regret which leads to gladness and then bodily tranquility, mental tranquility, joy, happiness, stillness, seeing things as they really are, disillusionment, dispassion, liberation.
So from this we can see that the causes for regret is not being virtuous enough.
Ajahn Brahm likes to say everything is out of control. Meaning that there’s no self in the driver’s seat. It’s all causes and conditions. Yet, those who realized this properly are morally upright. So the method language of out of control shouldn’t be mistaken as a goal language applied to morality.
PS. ajahn Brahm also uses the term: you are good enough. It’s the wrong way to approach it as goal language as it implies no need for improvement in morality if one is still unfirm in it.
It’s a method language for the goal of removing worry, self doubt, blame, and thus the motivations for unwholesome actions. That’s how one becomes morally ok, by total acceptance internally. With loving kindness towards oneself, one is able to act from good thoughts, and be naturally moral.