I'm having a genuinely hard time understanding the logic of this statement.
I haven't gotten through the entire article but I'm surprised no one's brought up the natural down regulation your body/brain does in reaction to elevated levels of any hormone. This tolerance the body builds up is one of the forces that cause people to become addicted to things because then they have not only the positive reinforcement but the negative reinforcement of needing the thing just to feel normal. Its the hedonic treadmill.
To my knowledge there is no evidence that more dopamine gets created when practicing unhealthy behaviour. Neurotransmitters are much more complex than the simplistic fasting model describes. If you don't have severe malnutrion (e.g. not enough tyrosine etc.) or Parkinson or ADHS or similar, the dopamine is just there in your brain, waiting to be released as needed. We don't create more of it just because we look at insta 50 times a day. And we can't use it all up through behavior alone (but things like amphetamines do, of course).
The metaphor of dopamine levels working like battery levels is simply wrong. High levels of dopamine correlate with good mood, but also schizophrenia. ADHS patients' symptoms can both get better and worse when consuming dopamin produgs.
Doesn't lower your level from a baseline.