Switches are just people who enjoy both dominating and submitting. It's not... don't try to overthink it, I guess? Instead of trying to define the term in more detail than that, the correct line of reasoning is "If I identify as a switch (or dominant or submissive or master or slave or whatever), what kind of
I've done multiple scenes IRL where I've punished other submissives on my mistress's behalf though. That's always really fun, and I've always gravitated towards the "head maid" archetype.
I don't really construct elaborate fantasies though, or if I do they don't involve any worldbuilding. My ideal "slave land" looks a lot like the world does now, but if everyone was a bit more open minded. Being able to be open about this stuff in public would be really affirming and nice. I suppose I also wouldn't mind superabundance, an end to aging and disease, world peace, etc, but a girl can dream.