I drank too much in my early 20s, but cut down considerably when I had children - mostly because if I'd had a few drinks and woke with a hangover it was hard to cope with then having to do kids' activities and, well, entertain them. I found that the alcohol induced sleep coma was not a nice, nourishing sleep and that I actually preferred that lovely, nourishing sleep and waking with a clear head. Mid 40s now, enjoy the occasional g&t or glass of prosecco, and thankfully no ill effects.
Dh drank stupid amounts in his youth (military), continued to he a heavy drinker in his 30s and early 40s and now he's in his mid 50s has recurrent flare ups of pancreatitis because his pancreas is so damaged. He no longer drinks, but I live in fear of him being diagnosed with pancreatic cancer, and his frequent stays in hospital are no fun for any of us.
People saying "YOLO, I'll continue to do it, your lectures are so booooooring!" aren't thinking about how their approach to alcohol may one day render their nearest and dearest grief stricken way before their time, or picking up the pieces while they're hospitalised through alcoholism. Mumsnet has become more alcohol averse in the past decade because we know much more about alcohol abuse, dependency and how binge drinking alcoholism punctuated by sobriety is still alcoholism.
Of course some people will drink till into their 90s with no ill effects, just as some lucky ones will smoke 20 a day and die peacefully in their sleep at 95. But our drinking culture is really damaging, no matter how much you try to dismiss those who champion alcohol aware as fear mongering killjoys.
I'm not holier than thou, I enjoy a drink. I've just grown up and drawn a limit that feels right.