Regardless your prior claim about one beer not causing brain damage is categorically false. While I was wrong about mechanism, its true, even drinking in moderation causes brain damage.

https://www.health.harvard.edu/mind-and-mood/alcohol-even-in...

https://heartbrain.hms.harvard.edu/grey-matter-changes

https://www.bbc.com/news/articles/c1l8q29jjezo