My point isn't that home brewing makes alcohol easier to obtain; clearly it doesn't, as you pointed out.
Rather, it provides a respectable rationale for having a beer (e.g. testing a batch, checking the bottle fermentation, seeing how it pairs with a meal).
Drinking is now part of a productive, interesting hobby. For most people that's harmless, but for a vulnerable individual, the hobby supplies frequent opportunities, a steady supply, and an intellectually respectable reason to consume. That's all.
While it is a crazy world and I don’t want to say no one has ever done what you described, it would be an outlier to say the least.
Home brewed beer is generally bottled or put into a keg and tapped.
(Almost) no one is just drinking warm uncarbonated beer from the fermenter.
The median Drinker / non teetotaler consumes about 0.5 drinks per day.
People with severe alcohol use disorder often consume 10 to 20 drink equivalents a day, most commonly cheap hard liquor.
Basically no alcoholic is going to be brewing a keg every couple days for self consumption.
I absolutely have friends who stopped home brewing because they realized that having a tap of readily available beer in their house wasn't a good idea.
If you want to find people doing that you look for the illegal drugs that haven't had wide spread industries drive down the price, like meth.