Getting to the store, buying alcohol and negotiating it to your mouth all require choice and functions of the frontal lobe, no?
Choosing to not react by denying the urge and instead act to satisfy the urge is still a choice.
Making the choice to satisfy the urge, doesn't mean the choice to deny it doesn't(didn't) exist .
No matter how difficult either choice is or may feel, does not mean either course is impossible.