Why are orchestras popular? Why do record producers hire arrangers and studio musicians when they want a hit? Why do they use backup singers when they want a rousing chorus without raising the volume?
There are big name bands who make their living trying to play louder than their mates, but if you want to be popular, the main instrument, voice or other, must be right up front.
Still, who are these prima donnas who think they can't be improved upon? And where did all these off topic, hate Dick trolls come from?