Ideas are qualitative and inversely proportional to the approach and execution. If ideas are a dime a dozen and meaningless, then what was the point of getting rid of Drexler on Space Command? Star Trek is the only place where story concepts are not king. Doug was there to conceptualize the universe. Another casualty of power and politics. Zicree is full of himself. It would have helped if he got out of his own way.
You're basically restating my point and not effectively countering it.
Reality: Like him or not, Zicree has some track record writing TV shows, so he brings an idea and
practical experience to the table, to which an artist like Drexler brings something else. But if a fan has an idea for a TV show/movie/whatever but no practical/proven experience, that's a different and far-riskier proposition for the pro, and they wisely give situations like that a wide berth.