Well Clinton was Secretary of State, Americas top diplomat. A diplomat who always told the truth would be a disaster! A diplomat certainly has to keep secrets. Her whole email scandal is maybe she didn't keep secrets. Likewise, a diplomat who didn't back up situations with a consideration of using force would be a pushover. Other countries and NGOs would just walk all over us.

So you have more or less described her qualifications for being President.

We DID have a President who was exceptionally honest about everything, and really disliked secrets. His name was Jimmy Carter.