I actually agree with you 100%, this is also why I like getting unmapped or public mapped groups. Interactions with other groups to me are pretty fun, I'm not sure why more people don't participate in that mindset but I'm sure there's groups out there that see it like you do.
Even though I like a nice private map, there's no real interactions with outside packs/clans unless they're part of the plot. Which is completely understandable that groups do this to keep things organized.
I guess my point is, maybe mention your opinion to your leader - if they don't want to then you can't really help that I guess. It's just a matter of finding interactive groups I suppose!