Chatgpt has 469 million daily active users as of September 2026. Who exactly do you think they are? Martians? Because there aren't half a billion SWEs on planet earth.
Corporate structures are things you know about if you follow tech news, but people mostly do not know about them otherwise. They've never heard of "Alphabet" either. Stuff like that.
Show me any brand in a supermarket and I couldn't tell you who owns them.
When put in these terms it shows it's perfectly normal not to know who's behind chatgpt.
Quick test, who makes Mars, Twix, Snickers?