Food, gambling, etc. are all backed by hordes of brilliant well paid people trying to get you to ruin your life so they make money. On the other side is just regular people like us stressed out trying to survive.
This isn't some "freedom" issue, it's an incredibly huge power asymmetry and I think "we the people" need protection from these forces
If I don't, then the bookmaker is powerless as regards my money.
If I do, then I also gain some power over the bookmaker's money.
I don't expect many to see it the same way. Most people are more concerned than I am with the problems suffered by those whose decision making does not interact well with the existence of the gambling industry. Given their concerns, it is understandable that they wouldn't share my perspective.