I can respect that I am taking it literally although I am just responding to how you talked about it. You said "I don't really have "secrets" so anything is on the table." A poster mentioned secrets and privacy aren't the same thing and you responded you appreciated candor and sure you don't have to share what you don't want to but it wouldn't put you off as a guy. That's why I responded to me the key would to not assume that when someone is being private about something it's not the same as having secrets. If you expect (not said in a negative way) the other person to be the same you may see something as a secret when they are just being private about something. IRL most of us yes understand not everyone is like us in preferences (it's also why dating, especially early on, can be frustrating).
I don't think you were knocking anyone just me agreeing with the discussion that privacy doesn't equate to secrets. I can imagine how for instance a miscarriage that another poster brought up could be a very personal private matter that someone could interpret as a secret if someone became uncomfortable at the discussion of children. Generally it's natural to discuss children in the midst of dating, miscarriage (or death of a child) may be not something someone is willing to be open book about and if someone sees uncomfortableness at the topic of children as being cagey or hiding some details they may misinterpret the intent. And the flipside if someone is comfortable talking about that all power to them but in most respects that's a topic that is not one most would consider dating conversations.
I get in a way what the PP's guy friends were talking about (even if we're talking about something completely different than a miscarriage). You don't have to put on a front about yourself or hide yourself to be less oversharing or to discuss topics that are typically considered more appropriate (especially when you're in the early stages of dating). I have zero issues talking politics, religion, and social issues. But I don't generally discuss that with people I just met. And you're not going to find out my whole life story and all the issues with my messed up family when I just met you either. I'm a very chatty, outgoing, extrovert (with some introverted tendencies). I have no problem striking up conversations with random people in public, and there's a lot of talking going on with new people, there's still things that are well private.