You can find idiots anywhere if you look hard enough. It's not too hard to find a few on this board. Look around.
Yes, the Mounties do attract a certain personality type, but that's not universal and not an absolute. You'll find plenty of cool people that have gone through the Basic and Intermediate Climbing programs with the Mountaineers. In general, I'm more apt to trust somebody who has gone through a structured program like theirs. It's not that their training is so superior... it's not. However, I know that anybody who has gone through their Intermediate Climbing program has covered the basics and knows rescue systems. Those climbing actively have hopefully grown a bit, been exposed to other methods, different systems, and integrated best practices into how they climb today. Yes, there are those numb minds who are the notorious ones referred to on this site, but they tend to dwell within the ranks and stay there. That doesn't mean you have to.
The Mountaineers Intermediate Climbing Program is a good thing if you want a structured program that covers the basics of leading on rock, building climbing anchors, rescue systems, alpine ice climbing, and mixed climbing. I'm in the Everett intermediate program even though I live in Seattle. I'd give a big thumbs up to looking at the smaller branches if you're really interested.