In my experience, the main reason to not eat healthy or exercise is because doing those things takes time, easily a LOT of time (e.g. cooking and cleanup easily account for 2-3 extra hrs/day and the numbers are similar for exercise [both active (dedicating time to it) and passive (walking around everywhere)]).
In the same vein, use of psychoactive substances is probably also a tradeoff between taking time to properly conduct mental maintenance v.s. a quick and dirty solution.
In my experience, the main reason to not eat healthy or exercise is because doing those things takes time, easily a LOT of time (e.g. cooking and cleanup easily account for 2-3 extra hrs/day and the numbers are similar for exercise [both active (dedicating time to it) and passive (walking around everywhere)]).
In the same vein, use of psychoactive substances is probably also a tradeoff between taking time to properly conduct mental maintenance v.s. a quick and dirty solution.