Your construct assumes whatever material HRC mishandled was deemed secret because such secrecy was vital to national security, rather than bureaucratic reflex and/or a desire to keep the material away from the American public, lest it embarass the Powerful and Wealthy.
You have no basis for that assumption other than "If the government declares it secret, it MUST be vital for national security." Why would you selectively trust your government in this very narrow question?
Meanwhile, the problem with The Donald's comments to Billy Bush are NOT that the made them, but they reflect a pattern of behavior on his part which is extremely demeaning and dismissive of women, who make up more than half of the population. If Trump had a history of being faithfully devoted to his one wife of decades and no record of mistreating women, his comments would be irrelevant. But Trump's history is Trump's history, and his "Grab them by the p***y" comment is simpy a recapitulation of that history.