Every day I see a celebrity in an ad for gambling and they all have the same defence "well, if people choose to gamble if they have a problem, then that's on them". Everyone knows it will destroy lives. But they say "that's on them for buying what I'm selling".
People are walking around perpetuating the moral compass of a heroin dealer like it's normal. You are responsible for your mark on the world and your fellow human beings. Yes, even if you only did the bad thing to get the money.
Some things are difficult to regulate, even as we know they are harmful and difficult to control for adults due to their addictive nature.
You don't have to think about it very hard to realize that kids, who have not yet learned to emotionally regulate themselves, will be even more vulnerable to these things if we push it on them.
For the record I think the gin industry should in fact be regulated from marketing their product as a pacificer for kids. I find it very difficult to believe that you don't.