My mom uses to take and create pictures of things: identifying birds, identifying trees, and showing her house with different decor. I didn't teach her any of this, she just figured it out on her own.

A non-tech friend of mine who's writing a book uses it to get feedback on his writing. He's gotten pretty good at crafting prompts to get it to be fairly objective.

Another non-tech friend used it to do a lot of journaling and processing after a recent breakup.

A non-techy friend who happens to work in tech uses it to make presentations at work.

Another non-techy friend of mine who works at a tech startup uses it to browse LinkedIn and find people she's searching for.