I don't understand your logic. This is addressing a real problem faced by people in America. I think what you're saying is YC billionaires should be fixing everything about our healthcare system instead?
First, other billionaires have tried and failed[0]. Billionaires don't stand a chance against a trillion dollar industry. Second, did you ever consider that a more realistic approach is to start with easily addressible problems like this one rather than trying to boil the ocean.
[0] https://www.cnbc.com/2021/01/04/haven-the-amazon-berkshire-j...