In the 1990s, the “French paradox was all the go; that the French had lower incidences of cardiovascular disease than societies like Briton. French wine makers put this down to wine consumption, and thus the idea was kicked off that moderate alcohol consumption was good for you. The antioxidants in the wine must be acting as a means of cleaning out arteries. This notion gained some support, and soon became a part of popular wisdom. Some researchers opposed it with contrary studies, and it took decades before the idea that alcohol could be something of a health food was debunked. Now, the safest level of alcohol is none: https://time.com/6248439/no-safe-amount-of-alcohol/
But, there should have been more thinking about the French paradox in the beginning. Even if it was true, perhaps it was not alcohol, but antioxidants in the wine that was causing the reduction in cardiovascular events, such as resveratrol? More likely, the French diet simply may have been healthier than the typical British diet. This matter shows that science, medicine and nutrition in particular, is subject to its fads and follies, and we should take what they say with a bag of salt; not to be eaten of course, you know, hypertension. (The salt issue too is open to debate, needless to say, with one idea being that low sodium diets may also raise blood pressure.)