As you have probably heard before -

Lighter, stronger, cheaper. Choose two.

Usually the higher-end stuff is the lightest, while still being just as strong or stronger than the cheaper(and heavier) stuff. Therefore, it's not cheap. Even if the company has already found a cheap way to manufacture such light, strong components, they won't pass that savings on because they know the market will pay it. People who want the lightest components for a high-end bike will have no problem paying for it- No matter what they actually use it for.