The prefrontal cortex evaluates tasks using a 'Cost-Benefit Analysis.' The neurotransmitter dopamine is the currency used to 'fund' the action.
Paying a bill provides absolutely zero dopamine. There is no novelty, no reward, no immediate pleasure. You are simply returning your life to a neutral baseline. Because the reward is zero, the brain's 'Action Threshold' is incredibly fragile.
When you encounter friction—like a forgotten password—the 'Cognitive Load' spikes. The working memory must hold the goal (pay bill), the obstacle (reset password), and the context (check email for code). The ADHD working memory cannot juggle these three elements without dropping one. The brain calculates that the energetic cost of untangling this administrative mess exceeds the available glucose, and actively initiates an 'Avoidance Freeze' to protect itself.
