I want to agree with you, and I think I mostly do.
Unfortunately your comment also reminds me how enormous the barriers remain toward people recognizing alcoholism and having the will to treat it. There's an enormous amount of shame, stigma, and denial toward alcoholism, to the point that most who suffer from it still choose to hide that reality as much as they possibly can.
Even worse, the legality of it promotes a culture of celebration (advertising, fancy and elaborate liquor branding, snazzy bars, nightlife culture, bottle service, etc. etc) that is in so many ways uniquely destructive in its own right. Like everyone should be able to find joy in drinking, and those who struggle have something horribly wrong in them that carries the risk of denying them the good life, friends, social opportunities, cultural connection, and so on (suddenly mundane invitations to bars, cocktail parties, weddings, shows, dinner at a friend's home, drinks with co-workers, etc. become awkward and potentially dangerous).
There's a whole culture built around it: mainstream culture. And someone facing their problems with this particular drug face the prospect of losing access to the culture of their entire society. That's just daunting.
I don't think making alcohol illegal would help. But it's no walk in the park even legal. And poses some of its own unique challenges.