It is impossible for you to substitute your definition of correct for another person’s own when it comes to their body and their life without denying them agency and declaring yourself their superior, and in the process violating their rights to self-determination.
If they are harming no one but themselves, you have no moral basis to deny them their freedom to do so, unless you deem yourself competent to be their parent or guardian simply on the basis of that single decision of theirs, which is not reasonable by any stretch of the imagination.
> People need to be protected from themselves sometimes.
The only protection that most people want is protection from people who think this way about their lives, myself included.
If an individual can’t decide for another, no assemblage of individuals can legitimately claim that authority either.
I certainly don’t want to live in a place where it takes hundreds of years for the majority to finally decide that, for example, racial minorities really do deserve equal protection under the law (or a hundred years to reach the point where it is not legal to enslave them).
Surely you see the problem.
Ultimately power has to rest somewhere. If it's nowhere then someone will come and take it.
The modern alternative isn't some panacea. It's the corporation and the indifference of rights so long as it doesn't negatively impact the bottom line.
Said every dictator, ever. Also:
"It's for your own good"
"Without me, others would take advantage of you"
"I am protecting you"
"I know better than you what you need""Nobody knows better than me what is better for myself and mine."
It's not always true (see vaccination or smoking) but the alternative is much worse and in much more cases.
Smokers and anti-vaccination also use the same argument. Even though their actions are also dangerous to other people(kids). I am sure they felt oppressed when public smoking was banned. Smokers will tell you that smoking isn’t different to dangerous sports or unsafe sex. Yet, dangerous sports/unsafe sex isn’t banned.
Please address their point about antivaxxers.
And if someone does have a hermetically sealed room no smoke will escape from, I suppose that is OK, so shouldn't be illegal except forcing someone to do against their will.