I think this methodology is a kind of recipe for detaching from yourself completely, leave out the last two clauses which I do like. But, philosophy of suppressing emotions seasoned with substances which inhibit Default Mode Network in your brain? Sure thing if you have failed or feel stuck as a short term remedy, but ain't you gonna lose yourself if do it regularly?
On the contrary, stoicism helps you re-attach, especially if reality as perceived with your old mindset has become unbearable. Think of it as a way of viewing things, and less of suppressing anything. Emotions are generated as a reaction to your perception of reality - you will be fed up by the stranger running a red light, but your anger will swing to concern if you learn that they are heading towards an emergency room. Emotions are really just communicators of the reality you perceive. Stoicism might help you adjust your perception where it is just plain wrong. That’s BTW also how cognitive behavioral therapy works, just with the aid of a professional.
I‘m not sure what you mean with Default Mode Network inhibition. CBD is a cannabinoid, and those are present in all mammal bodies - it’s just an aid for faster repair, especially nerves and brain. You might find your brain working better and clearer, because it regenerates faster.
I understand, if you got your emotions cross-wired by crooked society, then you can put emotions on hold and rethink logically about what's happening. So stoicism is like a negative imprint of mindfulness, something like a maintenance mode. Mindfulness is about to stay present with both emotional and rational, and not trying to rationalize feelings.
DMN is an ancient part of brain which acts like primitive unconscious task scheduler. When it goes nuts, you binge on substances and reset it, then sober up and feel happy. Something like that.
