Good ideas come from all skill levels. But good idea vs bad idea ratio is fundamentally what separates those in or out of brain space. To get your ratio up, you need training and experience in making good ideas more frequently and bad ideas less frequently. And then you get placed in a space where your ideas are your core output. Those people tend to be salaried the most often. And they don't like to spend their time sifting through the bad ideas of untrained people when they could instead be generating more good ideas per unit time. I don't see the problem here