I'm selfish when it comes to topics like these. I enjoy wider fairways because I don't hit the ball all that straight off the tee. Sure - I enjoy a good punch out or an approach from a difficult position behind a tree or from the rough every now and then, but I also have a heck of a lot of fun when I'm going for the greens from the fairway.
I agree with many on here that "wide" can be a code word for "easy" though I've also seen examples of wide courses that can be plenty tough. I like to think of "wide" as a code word for "fun." Probably not for the best of golfers, but I care first and foremost about my own enjoyment when I'm on a course. At some point that will probably shift to my kids, assuming they decide to take up the game, but they're too young right now.
This thread reminds me of the "Are we contributing to the problem" thread (dealing with technology and equipment.) Only if we think there is a problem to begin with are we contributing. I can play the widest course with the best technology and still bust my ass and not break 80 unless everything falls perfectly into line.
It seems like we spend a lot of time crying the misery of how easy the game has become. I personally don't agree.
The finest players always rise to the top. As long as they are swinging golf clubs and hitting golf balls into golf holes, it doesn't matter if the course is wide, narrow, treeless, forested, fast greens, bumpy greens, slow greens, flat greens. At the professional level Tiger Woods is still going to have the advantage because he's the best by a wide margin.
Jordan, as to your coach's question... I don't know you, but I know what makes you play bad. It's the same as the rest of us mortals, though it impacts us to varying degrees. It is lack of focus and complete dedication to each individual shot (and for some of us layer on a little lack of talent, but the former still hinders us more.)