Cigarettes could sell at 3-4$ a pack only because some regulation are in place that enforce the total separation of manufacturing and selling those packs from paying the cost for the societal damages wrt. health, pollution, littering...
There are many possible ways to slice the economical cake.
I'm not sure what your point is here.
1) They don't sell for $3-4 a pack, yet your post seems to imply that the system has failed for cigarettes.
2) For externalities beyond the input cost of a product, the default [natural] condition is for those costs not to be included - one needn't enforce anything. Rather, it requires that someone with power put their thumb on the scale to enforce the inclusion of those costs during a sale[1].
[1] https://en.wikipedia.org/wiki/Pigouvian_tax
Sorry it was unclear, I was replying specifically to:
> If cigarettes were 3-4$ a pack (which they would be without sin taxes and regulatory overhead),
Trying to show that 3-4$ a pack is not a more "natural" price for cigarettes than the current one, that it is a matter of perspective, and that if one wanted to construct such a natural price all externalities would have to be taken into account.