There was no “enshrinement” and it clearly saw it would end and the suppression of importation after 1808 shows that.
There was no worshiping of slavery in the Constitution.
Of course the Northern states wanted to ignore that constitutional requirement without actually passing an amendment to repeal it. They wanted to pretend it didn't exist or that it meant something different from what it actually meant. Same liberal "living constitution" crap that they still try to pull now.