You're exactly right, someone with enthusiasm suggests how they think things should be and someone worn down by the industry talks beside the question by stating how things are.
Unfortunately, even with all the enthusiasm in the world, the lack of experience basically means your idea of 'how things should be' may not very well rooted in reality.
Let's suppose though, for the sake of argument, you're right. Idea Guys are a downtrodden and under-appreciated font of creativity, and games developers should make better use of them.
How do you propose we harness their untapped potential? Should studios start hiring Idea Guys? What are you actually proposing here?
How about this, you move from huge projects being the standard to medium sized projects. You give the game designer an even bigger say and have him work form an idea he came up with himself or is extremely passionate about. The problem of course is, who in their right mind would finance that over some sequel or rehashed game that is a guaranteed moneymaker? It might turn out to be a flop, it will definitely not appeal to as large an audience as AAA games do, but the end product will have a hell of a lot more integrity.