You are entitled not to disclose all of that - you just cannot run for president with the finger on the button, command the military without congressional approval, and the ability to stack the supreme court.
It's a job application - for the most powerful position in the USA, arguably the world. I want a decade of financial history, credit check, drug test, last five places you own/lived, etc.
I have worked for a government entity in a policy making role, and one of my obligations was to annually file a detail of my investments, business dealings and other things in a manner that balances the public's need to be assured of my integrity with my need for privacy in my affairs.
Disclosure of medical data is an even more egregious ethical and privacy violation. Why should I as a political figure need to publicly disclose my use of narcotics to manage pain from a chronic medical condition? Why should I need disclose the use of drugs that imply a potentially embarrassing medical condition?
Medical diagnoses affect people's view of people. I don't want otherwise good people excluded from public service because they are HIV positive.