Dopamine (and other neurochemicals) functions more like a currency than a happy button, it's emotional worth is determined by the economic health of your mind and not merely the net amount of dopamine in your system.

For example taking drugs is like printing money, you can only print so much before you cause large scale economic inflation (lowering the value of the currency, causing a perception of scarcity (addiction)).

The practical implication of this theory is evident in the nofap, and delayed gratification movements.

Mindset is your law, personality your citizens.