This is a compelling argument, i.e., that regulated promotion is part of the long game toward protection against toxic behaviors. Probably the most notorious example would be supervised injection sites. The devil in the details is to what extent do you impose costs on the public majority that isn't afflicted with the problem, and accounting for all of the externalities, not just those produced by a commissioned "study". It's one thing to implement a progressive tax to claw back some of the advantages wealthy people reap from regulation. We can read those numbers on a balance sheet. Quite another to actually build the betting parlor or injection site, which invariably lands in the lower to middle class communities. Who's really paying the higher costs here in broad terms of value and quality of life impact?