Fear of observation is highly correlated with neuroticism. Creativity, on the other hand, is a component of openness which is highly correlated with intelligence. The most creative people are those who measure both high intelligence and low neuroticism, which simultaneously are the people least concerned by impacts of increased observation.
Furthermore, high trust social environments only contribute to the degree of disclosure, not creativity. In low trust social environments creative people remain equally creative but either do not openly expose their creative output or do so secretly for subversive purposes.