Much of it seems to vary by jurisdiction. States will often require licensing that requires training for vendors of alcohol. In Oregon as a teenager I had to take a test sort of like the food handler's test to serve alcohol even as a busser. Licensing for businesses generally requires training, fees, and a record of not being irresponsible with alcohol sales. Some states require that hard alcohol only be sold in liquor stores that are tightly regulated, while others allow it in grocery stores. Regulation of alcohol production is done by TTB. They https://www.ttb.gov/consumer/responsibilities.shtml One problem with alcohol prohibition, and alcohol completely unregulated, is that improper manufacturing techniques can lead to methanol poisoning (blindness or death). That is why we have bureaucracies like the TTB - as industries do not tend to self-regulate especially on smaller scale operations.
How does the above suggest alcoholic beverages are subjected to greater regulation and oversight than firearms?
When did I say that? As far as I recall I never contrasted them, only stated that regulation is better than prohibition in both cases.