I agree with all of what you said in principle, but, let’s face, the Constitution is simply too difficult to amend with the present rules. With a lower threshold for getting amendments ratified, we wouldn’t have to worry so much about wrongheaded SCOTUS decisions doing it by judicial fiat. And (I’m sure I’ll get flamed for pointing this out, but what the heck) if the Framers were so darned infallable, and the Constitution so ingenious, then why did we have to fight the bloodiest war in our history to settle the slavery issue? And, on a less dramatic note, why have we tolerated a SCOTUS that regularly strikes down federal and state legislation, when that power is not given to it anywhere in the Constitution’s text?
I don’t want to flame, but on the point of Slavery, remember that Slavery was then a tolerated human institution, as it had been from the beginning of recorded history; present and accepted in every civilization and age. We see its evil now and consider it obvious, but that’s more hindsight than innate wisdom.