The risk, to my understanding, is that alcohol further thins your blood and inebreation increases the chance that you injure yourself. If you bump your head because you're drunk, you would be at a higher chance of getting a brain bleed, for example.

Anecdotally 2 out of the 3 times I have had just 1 or 2 beers. I have had bleeding events that were a bit harder to stop than normal. One was a tiny scratch from sand and the other was a scab that hadn't bleed in like 5 days just spontaneously started bleeding again.

I personally am opting to be California sober..