Not fighting reality

Hi coaches!

I would like help to clarify the concept of not fighting with reality. I understand that fighting against reality and thinking things should be different don’t serve us, and I understand and practice acceptance. But I am not sure I totally grasp the concept as we have examples in the past of people who have fight against reality like Rosa Parks for example and change the world thanks to this.

Can you help me please understand better the concept?

Thank you!