Alcohol is unhealthy because it leads to bad decisions

The argument

The argument locates the harm in a specific, traceable mechanism rather than in a general disapproval of drinking. Alcohol acts on brain chemistry, altering the levels of multiple neurotransmitters at once — dopamine, GABA and norepinephrine among them. It also decreases activity in the prefrontal cortex, the region responsible for rational decision-making. Those two effects are not separate from the reason people drink; they are the same effects. The pleasurable, characteristically drunk feeling alcohol produces is what the altered neurotransmitter levels and the suppressed prefrontal activity feel like from the inside. That identity is what makes the argument difficult to answer by advocating moderation alone: the sought-after effect and the impairment are not two consequences that could in principle be separated, one kept and the other avoided. To get the first is to have the second. What the second consists of is a measurable change in how decisions are made. Suppressed prefrontal activity increases impulsiveness and decreases the brain's ability to make smart decisions — to weigh a delayed cost against an immediate reward, to hold a consequence in view while acting, to stop. A person in that state is not merely less inhibited in a social sense; the faculty that would ordinarily veto a bad course of action is operating at reduced capacity. The downstream consequences follow directly. Impaired judgement produces higher risk of accidents and injury, of criminal acts, of violence, and of unsafe decisions of every kind. These are not incidental misfortunes that sometimes accompany drinking; they are what a reliable reduction in decision-making capacity produces when applied across a population. This is why drinking is unhealthy on a broader definition of health than organ damage alone. Even setting aside what alcohol does to the body over years, what it does to judgement within hours generates injury, harm and risk — and that is a health cost.

Premises

Counter-arguments

-Not everyone makes bad decisions when drunk. -Alcohol can be consumed in an environment where bad decisions are controlled.

Rejecting the premises

[Rejecting P1] The neurochemistry establishes that alcohol reduces the capacity for careful deliberation at sufficient doses. It does not establish that drinking produces bad decisions, since dose, tolerance and setting all mediate between reduced prefrontal activity and any actual choice. [Rejecting P2] The step from impulsiveness to accidents and violence assumes a context in which impaired choices carry consequences. Where drinking happens in a controlled setting — at home, among friends, with transport arranged — the pathway from impairment to harm is broken. [Rejecting C] Even granting both premises, what follows is that drinking carries a risk conditional on circumstance, not that it is unhealthy as an inherent property. Many people drink without making the decisions the argument treats as the predictable result.