Understanding the name structure doesn't mean we now know all the ways to refer to them based on context, (presumed) relationship, legal form, etc. Broaden the cultural context enough, and even the legal name shifts in expectation.
Information is complex. You already know that. I'm here to tell you, as someone who freaking loves information, that it's probably even more complex than you currently think. We have a tendency right now, on a social level, to makes things simplified (often binary), and try
This is one of those instances (like fully accessible design) that businesses have to let go of some things that they've prioritized and built entire machines around.