One of the things that makes great churches and great institutions great is that they cultivate an environment where it is safe to make mistakes when attempting great things.
It's not that great churches and great institutions celebrate mistakes. Mistakes are typically costly and messy.
But when attempting great things, finding better solutions to age-old problems, when people are giving their best to do grand things, mistakes will be made.
In order to cultivate an environment and ethos where people are free to try new and different things, there has to be a culture of celebrating people's attempts at trying to do things better. When such mistakes are punished, it will lead to a culture of playing it safe, and in time it will kill creativity and it will kill greatness.