People are influenced by advertising. Especially those under the age of 25 such as yourself where the prefrontal cortex (the part of the brain that involved with decision making) is usually not completely developed yet.
"People are responsible for what they choose to consume" only takes you so far when people's ability to decide what to consume is shaped by their peers, the advertising they see and ten million other factors in their life. I remember thinking the way you do... and then I grew up and realised people are infinitely more complex than I had given thought to.
I'll admit including it is patronising and in itself immature. Maybe this is my "Why don't people realise that other people are complex beings?" moment and in another dozen years I'll be chiding my past self again!
Anyway, the biggest problem here's not the brain, since adults get addicted just as well.
The problem's that some truly evil people have created yet another addictive product, spent a lot of money to market it and now the poor sods using it are stuck with the ill health and addiction.
And the rest of us have to pick up the pieces while the miserable bastards which invented this get rich. Oh how I hope they're thrown in a dungeon.
Also I used to inhale cigarette smoke second-hand in restaurants and bars when that was still legal. I don't think my asthma got any worse from it that I am aware of (although I am very thankful that's no longer a thing anymore... tried going to a casino in a state where it's still legal recently and coughed like crazy... I was only there to see Penn and Teller perform).
I'm curious how you reconcile your decision to smoke tobacco while also thinking people are responsible for all their decisions. Do you accept that you're making a terrible decision? And if so what kind of person does that make you?
so i'd rephrase your idea:
"Got lungs? Maybe avoid <living on planet earth>"
The toxicity from smoking is entirely avoidable by not engaging in it
This is not at all a cogent argument. Don't blame the nanny state for problems you brought upon yourself.
And if said product is harmful, one has a public health issue on their hands. The sad thing is that we've already been on a similar path once with normal cigarettes: the lying, deceitful marketing, the people dying in droves, addicts proudly proclaiming their rights to self-determination.
Are you advocating for Juul to be more accessible to minors? Lowering the minimum age to consume tobacco?