This is incredibly ignorant. The Church didn't kill anyone for being good at art, and in fact did more for the development of fine art than any other institution in human history.
Anything that detracted from the grandour of the church was evidence of satanism. So, if you got a painting that looks better then what's on display in church, you were gonna get executed eventually.
If anything the opposite argument would be that without relgion art has devolved has more merit than this.