Public drunkenness is already against the law; operating heavy machinery and doing various responsible tasks (parenting, surgery, driving, air traffic control. . .) while drunk is against the law; supplying alcohol to minors is against the law.
So there is already quite a bit of “nanny state” intervention as you term it.
So there is already quite a bit of "nanny state" intervention as you term it.
No, I do NOT term the above as "nanny state interventions". They are laws concerning public behavior that endangers or interferes with other individuals, not someone's mental capacity.
You said you supported government intervention for those who are "deliberately destroying their mental capacity". I ask again, what interventions do you propose for the hundreds of thousands of alcoholics who are doing just that?