I think it's more likely that it reduces your tendency to discard ideas that on the surface seem bad. Some of those seemingly bad ideas will turn out to be good, so if you take them seriously you'll look more creative, even though you didn't actually come up with any additional ideas.

In my own case it does (or at least the first one does) because it reduces inhibition from creative impostor syndrome.

It also helped occasionally in severe OCD crises when no other strategy would break a cycle of compulsion: literally a single shot of alcohol will.

And it can help if I am stuck in self-defeating ADHD loops.

None of these things are advisable or worth the health damage even small amounts of alcohol could be causing. The only thing that is worth say a dozen units per year is reducing social anxiety. There are people I only know because I had a rare drink.

There is the mysterious Ballmer peak after all.

Weed massively increases creativity in everybody I asked, sure as hell does for me. Its not very controllable, ideas comes semi-randomly and works with topic processed previously, but damn so many results are actually good and stand test of time (I mean decades, like apartment interior design).

Alcohol? Social lubricant for sure, but creativity is contained only in the mind of a drunken fool who thinks better of his ideas than he should. That I never experienced, nor have witnessed and I certainly didn't avoid such situations.

Guess we'll have to ask Jackson Pollock. Wait, he died in an accident while drunk driving.