PITTSBURGH — The NFL draft could have easily been an email, a redundant joke seen on social media well before the Raiders made Fernando Mendoza the No. 1 pick Thursday. Believe me, I got the joke the first time I saw it, especially as someone who would much rather stream a highly anticipated movie from the comfort of my home than to leave my couch and watch it on the big screen in a stuffy theater, fighting for elbow room.   Maybe it is weird behavior for fans to travel several miles just to stand for hours in crowded spaces to hear names rattled off. But I’m an introvert who’s here to defend the draft-going experience because I’m sure many of those critics on social media weren’t here in Pittsburgh to soak in the gorgeous views that I’ve seen the past three days.  I don’t know how the draft has been in other cities, but Pittsburgh was the perfect host.…