Which discussion categories should be public?

I’ve voted for a mix of public and private, but based mainly on what kind of content would be of interest to people stumbling upon it, less so as a means of people feeling more comfortable in revealing information that they might not otherwise in certain categories. As I’m not sure public vs private is the right way of framing it, as as Panda mentions, as it stands the barrier to accessing the platform is very low - anyone can self-register and immediately see the ‘private’ content. Which I don’t think is necessarily everyone’s expectation of private.