I do tend to think of choices that way. The way I understand the human mind is as a rational optimizer of utility. The brain has to balance all manner of competing sensory and cognitive input, and the mind constantly seeks to maximize pleasure and/or relief from distress. (That's what I mean by utility.) They say that all models are wrong, but some are useful, and this one proves very useful. Instead of dismissing people as disturbed or crazy, look for the pleasure or relief that their mind is optimizing for. Drug users destroying their lives by seeking the next fix do so because the pleasure and relief of the drug is greater than distress from alienating family and friends. This is why people have to hit rock bottom before they'll kick the addition; it's when the distress of ruining their lives overwhelms the lure of the drug. This model even helped me understand a friend with schizophrenia. Her decisions were quite rational, actually, but were based on distorted and false perceptions.

Now this is funny, writing it out like this brought a mini-epiphany to me, a different model of what "free will" might mean. Our minds do have the freedom to change and react differently to different sensory and cognitive inputs. We're not automatons fixed to a preset course of action. And it makes sense that way that even protozoans have some degree of free will. Intriguing!