> If something compels behavior vs. behavior remaining a free choice, a liberal society can and should treat it like any other source of compulsion.

Indeed, and if we want those behaviours to remain as things considered to be choices rather than the nearly inescapable negative life-destroying feedback loops (activities with high addiction potential, for lack of a more concise term), they should be treated with special reverence and highly restricted from outside influence. Put another way, if we want liberal societies to be sustainable, I'd argue all forms of overtly addictive behaviour should—in many cases—be banned from public advertisement and restricted from surreptitious advertisement in entertainment, and we should have definitions for those.

For ages we've not had cigarette ads on public broadcasts, and yet people still "choose" to smoke, meanwhile there's been a increasing presence of cigarettes among Oscar winning movies in the last 10 years.

If you are addicted to smoking and trying to avoid being reminded of it, you'd realistically have to stop watching movies and participating in that aspect of culture in order to regain control of that part of your life. Likewise, with gambling, you don't only have to stop going to the casino, you have to stop engaging with sports entertainment wholesale.