Using AI for brainstorming and research is fine, but just copying AI text isn't right. It's important to create your own original work.
In coding, using AI to help write code is accepted because it's seen as a tool for solving problems. Many startups even use AI to write a big chunk of their code.
People still look down on using AI for creative writing because it feels less personal. Original human writing has a unique touch that AI cannot replicate.