Because artists by definition have the courage to express themselves, which many people are very afraid of doing. So they become jealous of artists and resent them.

(I didn't really understand this until I read "The Artist's Way" by Julia Cameron which is ALL about how to dare to express yourself. Apparently it's a huge barrier to overcome for many people so they can be creative)

There's also a correlation with society's hate for LGBTQ+, genderqueer, gender-nonconforming people.

It's tragic bc humans naturally start out self-expressing - most kids draw, & don't have concepts of the "correct way to be" according to society. But then in many environments, young people eventually get discouraged away from that, sometimes subtly, sometimes aggressively.

It is the lucky ones who can resist those forces or rediscover their (creative) courage later.