However, one could equally as well argue that we don't need average people to be able to read or do maths. They can learn it all from videos on Youtube et al anyway, right?
More seriously, the notion that most people can't produce wonderful things is the single most pernicious lie of our times. Everyone is born with more than enough potential to do great things, and the job of society is to give them the tools and encouragement they need to do this.
So, don't sell the species short. We may not need everyone to create new things, but hell, it couldn't hurt, right?