The effects you're talking about are for a weird lab experiment where they sort of had people sit there in the lab and drink (or not). Where people on GLP-1s -- in a randomized, double-blind study, notably -- chose to partake of less. I cannot fathom how you dismiss this.
It's a 9 week study at very low doses, and already a significant measurable effect was seen. Now if this wasn't a double-blind study I would dismiss it, but otherwise yeah, it matters.
People who have drinking habits will take a long time to adopt new habits. I would never expect to see baseline behaviour changes in so short a time. But their non-habit desire for alcohol clearly was diminished, hence the lab outcomes.
