You could make the same argument about sugary beverages, that you can't legislate intelligence, yet every country that has imposed a considerable sugar tax has seen benefits across the board. This of course omits a lot of nuance, but the main takeaway remains the same. We all have that monkey brain inside us and sometimes we need guardrails to defend against it. It's the same reason we don't allow advertising alcohol and casinos to kids, and many other similar examples. (Or at least we don't allow it where I'm from, maybe the laws are different where you're from.)
>every country that has imposed a considerable sugar tax has seen benefits across the board
Is there strong evidence for that? The first study that pops up if I search this suggests otherwise, that it could increase consumption of sugar-substitutes and overall caloric intake. https://doi.org/10.1016/j.tjnut.2025.05.019
>we need guardrails to defend against
There is no "we". You say that I and others need it, and you want to impose your opinion by taxing us.