The point is they'll openly say "settled law" and then immediately unsettle it. "Corporations get free speech" is a concept granted over time (and fairly recently) by the courts, not explicitly laid out in the Constitution. (Doubly so at the state level; it wasn't until the 1920s that SCOTUS even said the First Amendment applied to states. https://en.wikipedia.org/wiki/Gitlow_v._New_York)
> It's been 50 years…
Right about the same amount of time Roe v. Wade stuck around.
Look, this current Court certainly isn't gonna ban advertising; if anything, it's more likely to permit government-required advertisements right into our Neuralink headsets… but a future Court could easily say fast food advertising or social media for minors is just as bad as cigarette advertising was.