Earlier quoted context omitted.
Sounds like a personal problem, because no, it's not hard to say that.
Because peer pressure only exists in high school? And maybe it's not hard to say no to a single drink, but a lot of these events go past midnight, and the reason they "work" is because the next day when you pass each other in the hallway you can say "woah, bit of a hangover too?" and, silly as it sounds, bond over that. Good luck with that if you're only going to drink water, surrounded by people getting progressivel…
Those who don't develop it before 30 or so will always suffer at the hands of those who do, and the latter group includes people who consider themselves inclusive and socially conscious.