Imo, it boils down to the destructionists believing that once a rule is written by man it is forever unchanging until they, themselves, want it changed.
But that is not the case.
Any rule written by man can be unwritten by man. The only people that would be kept out of the uprising if the destructionists fully owned the SCOTUS and every other judge bench in the country are those who wouldn’t fight back anyway under any conditions.
Never underestimate the ability of a liberal to deny reality and attempt to change the rules to do so.