When was the last time you saw an ad for cigarettes?
Those second-order effects are easy to mitigate with sensible public policy. And it's not like we have to invent the solution from scratch — we've done it before, very effectively.
This is the correct reply to the constant "but whatabout" replies, that inevitably come up whenever you suggest regulation. "You've regulated bad thing X, but then they'll do Y!" So regulate Y! It's not like legislators only get one crack at a law. We should elect a government willing to move fast and iterate when loopholes are uncovered.
The thing is that US Congress can't make laws. It just can't. It's nonfunctional. When it does that's the rare exception, and it better be perfect the first time because you won't get so lucky twice.
I was at a gas station today that sells tobacco. No ads. Its because even displaying tobacco products, let alone advertising them, is not allowed in that jurisdiction.
I'll bet you didn't see any cartoon camels or doctors recomending a brand though, because even where tobacco ads are legal, many tobacco ads are no longer legal.
Whether you see ads, and what kind of ads you see is highly regulated. That's the whole point,
Those second-order effects are easy to mitigate with sensible public policy. And it's not like we have to invent the solution from scratch — we've done it before, very effectively.