So, my opinion on all of this is that it really just matters on the group and the people. I mean, from my point of view it's just a bunch of words that really just say "brah, you gotta do what you normally do and talk to your players about what they expect outta the game" and if something comes up that they are uncomfortable about they can set me aside during a break or after the session and we can discuss it.
It's all about being adults, I guess.
And yeah, I do get a little agitated when people stress about PC culture, I do as well, but I think I just have too much exposure to the internet and need to detox for a little while.
All in all, I don't think people are going on about it being "safe and happy". It's just words, guys. Ignore them if they bother you.
EDIT: Whoops!