Enforced ignorance.
Adams proposed and signed the Alien and Sedition Act. Do you really think that would be considered constitutional today, or should?
The Congress was full of Founding Fathers, but they did not all agree with his policies on the 'Quasi-War.' Neither did his Secretary of State, Timothy Pickering, who helped frame the Constitution.
Yes, even the Founding Fathers were politicians.
Yes, they were politicians: the same ones who complained of the Quasi-war were the same ones who approved of the Barbary campaign!
So they were imperfect- you are avoiding the point- "If you think there is a better way to understand the Constitution than by taking the understanding the Founders had of it-" then cough it up.