Same reason the news doesn't do stories about "Husband and Wife went to work, picked up kid from daycare. Situation Normal".
I'm really glad alcohol isn't an requirement anymore.
I too am glad alcohol isn't a requirement anymore, though I still get weird looks.
The truth is most likely that that boring company has always been a boring company, with not much happening. Still, sometimes, people fuck at work, drink a little too much at parties, and drugs exist. These things happen occasionally and sometimes, these events surface, get mixed up, amplified, and you get stories of orgies.
I also believe it's actually a part of their cultural inclusivity. It's a very stressful pressure if you're expected to go to a strip club with your colleagues after work if you're female, gay or in a relationship where such behavior would be sanctioned by the other party.
Americans and Asians apparently expect others to "fall in line" in all corporate policy matters, including this one. So as a result of globalization the corporate policy matters that one is expected to "fall in line" to have slowly become the least common denominator of all this cultures and that's the type of business chastity that is normal in today's HR rule books and everything outside is hastily sanctioned.
Well, the first thing I can tell you about us Americans is we make up a lot of stuff to impress people. Look at our president and his tweet about being a best selling author. Happy Fourth!