I agree with your proposed changes.
That comment was probably made by someone from a country where every pub has multiple beers on tap. They probably did not realise that there are countries where many pubs, restaurants and cafés only sell one or two beers, and having many different beers available is the exception rather than the rule. In these places brewery=various is useful and says something very different from just “place sells beer”.
By the way when the pub, biergarten, restaurant or café only sells beer from one brewery there is usually a sign outside, and branding everywhere: on the glasses, beer mats, awnings, umbrellas.
This picture helps illustrate the idea.
The two beer brands (Schneider Weisse and König Pilsener) are more prominent than the name of the pub.
To say that a place sells beer, there’s also drink:beer=yes which has been used 2,800 times (brewery=yes: 6,600 times). Is there any difference between the intended definitions of brewery=yes and drink:beer=yes? If not, then should the Wiki page maybe suggest using drink:beer=yes instead of brewery=yes? (Note the page already has brewery=yes and no as possible tagging mistakes.)
Should we also create a bug ticket in Every Door and ask them to encourage people to type the names of beers available, instead of selecting yes/no/various?
Meanwhile, real_ale= has also been badly misunderstood, but that probably deserves its own thread.