OpenAI has quietly become one of the largest healthcare providers in America: “They have 300 million people asking ChatGPT questions every week about healthcare. That makes them the largest healthcare provider in the world.” “The idea that all of us now have access to a world-class physician in our pockets at all times.. that is probably one of the largest changes that has happened in healthcare in a long time.” “Healthcare is the key hero use case for most people. For Silicon Valley, it's…