Doesn't it piss you off when a group of people are talking about boxing and they think they know their stuff.?

Today, I was at Starbucks studying for a midterm when a group of guys were talking about the Pacquiao-Cotto fight and I was curious to hear fellow boxing fans (or so I thought) opinions. They start talking about about whose going to win and such, and they all had generic predictions (i.e. "Pacman in the first round, Pacman wins by UD, or Cotto's tough, he'll win, Pacquiao demolished Oscar, he'll win for sure, "Cotto lost his last fight to that Mexican". I became infuriated and immediately wanted to jump into their conversation and they all thought they were touch macho men who know boxing when in reality, they're not even as knowledgeable as what you would consider, "casual" boxing fans. And then....one of the guys said.."Dude, Cotto's gonna win, trust me, I watched the whole 24/7 series"....and then that's when I just bursted out laughing, to which I had to pretend that I read a funny text cause they began looking at me. It makes me ashamed that you have people who consider themselves, "fans" to comment so primitively. I'm no Burt Sugar or Jim Lampey.....but damn.....I'm like Lederman+Steward times 104234 better than they are. Don't you hate it when people give predictions or talk about the sport when they don't even follow it?