With 100% devolved individual responsibility, you create market failure.
Nicotine based addition is a pure example of market failure.
To advocate for 100% unhindered individual responsibility, is to advocate against economics.
No rule-free economic market, free of arbitrary constraints, is ever truly rational.
That's because market failure is the default state of nature. The rich take from the poor, the incentive to economically specialize is lost due to theft.
"Personal responsibility" is a gross simplification of the complexities of political and economic science.
I would never simplify the enormous complexities of human computer interaction and UX, fields I know nothing about.
Don't over-simply how difficult a decision regulating nicotine was, and how many decades of academic careers have been sacrificed to come to this consensus.
Cable news slogans can never summarize the efforts of thousands of doctorate wielding technocrats arguing endlessly over the solution to nicotine.