I won't say it's absolute. I'll say it's just like driving. You know what your limit is, don't exceed it. In Utah, the legal standard is the same, .08.
Having said that, understand, there are distinct legal disadvantages. I had a neighbor once who was home having a beer. Halfway through it, her husband called needing help, he had a flat. She went out to meet him, and in the process had a minor collision with his car. No one hurt, minor damage, single owner. But when the police came, she was telling them the story, and included the "I was having a beer" part. They cited her for DUI. She said; "But I'm well under the limit." The didn't care, if she admitted to drinking, and was then involved in an accident, it's DUI.
Now apply this logic to carrying. If you are ever in a shooting, and you are suspected of being intoxicated, now the presumption of innocence has a BIG dent in it.