P.S. I'm betting their beer wasn't that great.
I was going to say the same thing.
My thoughts exactly. For them to think that all-grain is the only way of brewing simply shows their complete lack of knowledge and unnecessarily giant egos (over what, making beer?? give me a break).
Hang out here a bit more, and you'll see that we're not all like that nor do we all think like that.

A parallel: I ride motorcycles, sport motorcycles. You won't ever find me doing wheelies on the highway, revving my engine at a stoplight or wearing a mohawk on my helmet. You'll find me (and plenty of other motorcyclists) wearing all my gear - all the time, not cutting through small gaps in traffic and simply sitting at a stoplight without revving my engine. It is the former group that seems to give the sport riders a bad rap.