Here is a quotation from Thomas Jefferson regarding your plea to originalism:

Some men look at constitutions with sanctimonious reverence, and deem them like the ark of the Covenant, too sacred to be touched. They ascribe to the men of the preceding age a wisdom more than human, and suppose what they did to be beyond amendment... laws and institutions must go hand in hand with the progress of the human mind... as that becomes more developed, more enlightened, as new discoveries are made, institutions must advance also, to keep pace with the times.... We might as well require a man to wear still the coat which fitted him when a boy as civilized society to remain forever under the regimen of their barbarous ancestors.

In other words, what makes the thought of the framers so sacrosanct?