You'd like an example of someone believing an obviously bad idea? To Twitter!
https://twitter.com/page88/status/1100441460934131717
In which we find a link to an entire book oin the idea:
https://twitter.com/page88/status/1100441460934131717
In which we find a link to an entire book oin the idea:
IIRC Ruskin, a leading art critic in 19th century, argued that art (aka paintings) should be moral and Christian and I'm pretty sure at least a few really clever medieval and ancient guys shared the same notion (albeit their ideas of morality were probably different).
But it's not a universally accepted truth. Just one of possible interpretations I guess.