[Ken H]

I agree with this except to the point where people are deliberately destroying their mental capacity.

What sort of nanny state intervention do you propose for the hundreds of thousands of alcoholics who are deliberately destroying their mental capacity?

[Persevero]

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.