And yeah, for sure the only reason people outside of bluesky cannot see the content is because they're still figuring out how to actually serve image bytes over HTTP, which turned out to be a technically difficult problem that there is no prior research about.
If you dont mind using the console apps, it seems like you are able to query from gosky and slurp all(?) of the data with the bigsky app. Im not sure if that is intended though. I dont even have an account or invite code yet -- just on my local server.