Warnings aren't informational, they're motivational. Have you ever seen a health warning with a QR code that links to the data? No you haven't. Alcohol already carries health warnings, adding to them will likely have only marginal effect.

I'm not saying that this information shouldn't be in health warnings, but it's worth considering how health and safety warnings and signage are absolutely ubiquitous in modern society. It could be that the consumer warnings are a mediocre substitute for industrial regulation at source - just slap a disclaimer on it to avoid lawsuits and call it a day, so to speak. It's also possible that this leads people to either filter them out or causes them additional levels of stress. I value safety information, but I don't value having it shoved in my face all the time.