I can see the analogy too, and I agree that it’s certainly useful when we are talking about convincing someone to hold our values and beliefs.
But one interesting thing to note is that veganism is capable of the live and let let live mentality while privacy advocacy isnt.
I have a vegetarian friend and whenever I invite them over for dinner, it’s always with the knowledge that they will never eat meat. That choice is very personal because it doesn’t require me to change much about myself or how I interact with them. When I invite them over for a party, I just make sure to have vegetarian food options and let them live as they do.
It’s oddly different with privacy. You can’t just let other people live as they do because privacy is inherently an interpersonal phenomenon. The choice to be private is not personal; it conceptually demands changes to the environment.
Where being vegetarian merely requires me to meet certain conditions, i.e., to not eat meat, being a private person requires me as well as the people I speak with to meet the same conditions simultaneously.
The primary difference between vegan advocacy and privacy advocacy is that vegans are having discussions like this about changing people’s minds for ideological reasons, whereas we privacy advocates are having this discussion because it is conceptually necessary for us to individually attain privacy at all. I just thought this was an interesting difference.