I can tell you that I'm building a proof-of-concept medical provider registry on ethereum right now for a US state in my free time and the entire registry with

I can tell you that I'm building a proof-of-concept medical provider registry on ethereum right now for a US state in my free time and the entire registry with a rather deep security model and tons of functionality is a total of 230 lines of smart contract code (this represents the "server side" of the registry) It'll probably be around 500 lines if it reaches production. I bet you the next smallest state-level medical provider registry right now is probably 50,000 lines of server-side code. How does this make ethereum too complex to be useful?