Exactly. Fucking exactly. Thank you. You get it. My chronic illnesses are real. As a child, I went through all sorts of therapy and pain, but I don't see it as "trauma" - I think I just deliberately created and kept up my imaginary characters - and, as an adult, those characters changed themselves in different bits of my brain. They never take over. They never speak through me.
They are all me, all parts of me helping me cope with stuff... and maybe that is the only possible connection I don't know. The main difference may be intentional versus unintentional - maybe?

If I had DID, I certainly wouldn't talk about it like how I wrote in this post. You get it.