Isn’t creativity something that originates within? The people who are most afraid of being creative have learned (from parents, teachers, bosses, etc.) not to trust their own ideas, so they have essentially given up on generating them. Their creative ‘muscles’ have withered and all but disappeared. If they look elsewhere, they will tend to mimic the creativity of others, which is not the same as getting in touch with your own creativity. And, it doesn’t tend to lead to a belief in your own creativity. On some level, you know they aren’t your ideas, and you gain little or no confidence from ‘generating’ them. People who are comfortable creating can look elsewhere for inspiration and then return to their own thoughts and create original work, but people who are afraid they can’t create need to spend more time being introspective — thinking, doodling, making crafts … whatever creative things they can struggle through — until they begin to feel confident they can do it. It’s analogous to an astronaut returning from a long time in space and needing to wake up the leg muscles and teach them to walk again … watching how other people walk won’t do it.
Having said all that, it can be tremendously helpful if such a person can assist someone else who is comfortably and prolifically creative. The lead person can assign tasks that represent small parts of a project, but still require some creativity. Little by little, those tasks can be made bigger and more challenging … a creative apprenticeship as a way of gaining both skills and confidence.