It's entirely possible to have a conversation about all those topics but gets increasingly difficult when your friends fall in the cliche 80/20 category. 80% great people 20% not so much. I think parent poster has more of a problem with those types. You can chill and have fun but certain taboos open a can of worms that nobody wants to deal with especially when you just wanna decompress and have a few beers.

There's a time and place for everything and friendship dynamics get...complicated.