However, outside of the tech world, I've had to deal with plenty of people who are still disgusted by gays or get angry about the whole gay marriage thing
I work in tech in a very liberal Canadian city and have a bunch of gay friends, and sometimes get lulled into thinking the world is a big happy accepting place.
Then I step outside the downtown bubble, just by a few miles, and I'm stunned by what I sometimes encounter. I do a little writing for a group that makes short films, and we had a shoot where one of the actors didn't show up. He was part of a couple, and I suggested we recast the part using a woman who didn't have a part yet, so the couple would be gay but everything else would be the same. The film was about relationships and this couple was fighting about stuff. There might be a hug at the end, but nothing more overtly affectionate than that.
The young, professional woman I suggested this too looked at me with her eyes literally wide with horror and said, "I'm sorry, I can't do that. I'm really straight."
In that situation it wasn't my place to berate her for her bigotry, particularly as I didn't think until much later of the correct come-back: "You're really earthbound, too, but I bet you'd play an astronaut if I asked you to."
So yeah, while to so many of us this is a done deal, our gay friends and family still have to walk around every day wondering when they are going to encounter that kind of horrified rejection, and while at least they don't get beat up as often as they used to it still has to be pretty awful for them.
If anyone wants people like Tim Cook to stop making a big deal about being gay (and really, don't we all want that?) they should make sure to be accepting and matter-of-fact about the gay people all around us, whose much-talked-about "agenda" involves living happy, fulfilling lives.