Very true. But this is a virtue of human nature, and power. And in business (very generalised) you have the efficiency cycle and the efficacy cycle. Bosses generally only want advice on how the company can become more efficient, to question efficacy is to question his/her judgement and power.
But the ease by which people can now try, test, and launch an idea and business is tearing this model down. I think that very soon, the companies who fail will be those who do not recognise the leaders from within, with the ability to improve on enterprise efficacy.