If you are going to ask someone to sign an NDA (which is insane if the person is a VC), go all the way and put the "remedy" in the contract. If you disclose x, you agree to pay me Y.
Creating products that solve problems is great but you will not be in the "blue ocean". Did twitter solve a problem? No. Apple? Nike? Coke? Nope. They created great products that turned into a problem if you didn't own them.
A First year resident know jack shit about medicine and works 13 hrs a day making mistakes along the way in hopes of learning enough so not to make these same mistakes when they will be in command (5 years from now).
Hospitals spend hundreds of thousands of dollars training residents (med students learn practically (as in practical knowledge) nothing in med school). Therein lies the cheating.
This guy has one shot at learning medicine, his residency. If he wants run a trivial startup, so be it. But his first responsibility, at this time, in his training, (no he is not really a doctor yet) including his residence and fellowship.
The guy is a first year resident and should be working 70 hrs a week perfecting his skills. If he is cheating the system now by not being fully committed, I can only imagine what he will be doing 7 years from now.