Well, many of the actions, choices, and behaviors of history's great movers are of interest to some people today. We who love history and psychology are interested because "those who do not know their history are doomed to repeat it." It's certainly interesting to consider whether or not one of the nation's founders was either a consummate liar and hypocrite, was the innocent victim of ugly, unjust accusations--or was a man who sincerely cared for a half-white slave girl who was the image of his adored late wife. Such questions are of compelling interest to many of us.
It's your prerogative not to be interested. But it's just silly to keep on asking "who cares?" Obviously, millions of us do, or we wouldn't read books and watch movies about these matters.
Nicely put Capriole. So what if the founding fathers are proven to be as mortal as the next person. It does not lessen their contribution.