Sama also went on Lex and got over 5M views. The title was: OpenAi ceo on, ChatGPT, GPT4, and the future of AI.
So yeah, Ilya is a very known entity. No, ordinary folks don't need to know him, but if you are in IT and especially if you have anything to do with AI, then not knowing about Ilya tells more about your informational bubble than about Ilya's alleged lack of recognition.
It is akin to claiming to be into crypto on development side and not knowing the name of Vitalik Buterin.