Do you think most adults might be able to learn to use their imagination more?

I'd say most adults could definitely improve their imagination with practice, because it's more about habit than natural talent. As a UI designer in Shanghai, I've seen colleagues who initially struggled with creative thinking gradually develop it through daily brainstorming sessions and exposure to different design styles. For example, when I was training for my half marathon, I had to constantly visualize my progress and imagine crossing the finish line to stay motivated. That said, some people might find it harder if they've spent years in very analytical jobs where imagination isn't encouraged - but even they can start small, like trying new routes to work or experimenting with creative hobbies.