You are just absolutely incorrect. There is a massive and appreciable difference between me being okay with a small group of like-minded individuals seeing me nude at an event or location specifically intended for this, and my nudes being published for literally billions of people to see whenever and wherever they want without my consent.
Do you not see that?
Outside of your time at a nude beach, you deal with all sorts of people who may think it is a big deal and judge you for that. It may be in your interest to keep such people out of the know of your time at the nude beach. Think neighbors, employers, other parents in your PTA.
I still think about how unjust that was.
It's possible she was fired because she had unsecured pictures that were inappropriate for students at school and the students gained access to them. For example, teachers generally aren't fired for cursing/insulting outside of the classroom at non-students, but they certainly could be if it were in the classroom at a student.