If ads were merely about being informative, they would be boring. But ads want to manipulate, so they have to be flashy and appeal to your emotions.
They pollute your mental headspace, and have no place in a healthy society.
Let's ban billboards. And then let's follow that up with a general purpose ban on paid advertisement.
For most of US history, Commercial speech was not afforded full free speech rights. Nor does it currently enjoy them, although it is more protected than it used to be[0]:
Commercial speech, as the Supreme Court iterated in Valentine v. Chrestensen
(1942)[1], had historically not been viewed as protected under the First
Amendment. This category of expression, which includes commercial
advertising, promises, and solicitations, had been subject to significant
regulation to protect consumers and prevent fraud. Beginning in the 1970s,
however, the Supreme Court gradually recognized this type of speech as
deserving some First Amendment protection.
As such, it wouldn't require repealing anything. Just reinterpreting how the First Amendment applies (or not) to commercial speech. And given the wholesale tossing out of precedent by recent SCOTUS personnel, it's certainly possible (albeit unlikely -- and more's the pity -- in this configuration) for them to do so.[0] https://firstamendment.mtsu.edu/article/commercial-speech/
[1] https://firstamendment.mtsu.edu/article/valentine-v-chresten...
And the opinions on Gruen v. New York, Dobbs v. Jackson, Loper Bright Enterprises v. Raimondo, and especially on point, Citizen's United all broke with long precedent and turned things upside down. No amendments to repeal/change, just a different set of folks on SCOTUS.
And those were pretty dumb. So perhaps we'll have some improvement eventually, although I probably won't live to see it. And more's the pity.
Edit: Added conclusion.