[phkahler]

This is the standard statement of people who make profit from others ideas. If ideas are not worth anything, go implement your own instead of using an idea someone else had.

It's true that an idea in isolation is worthless. People need to bring it into existence, refine it, market it, in order to get any money out of it. That doesn't mean the idea has no value. To illustrate, one can ask "why this idea vs some other idea" and suddenly one is better than another.