This feels like the "defund/abolish the police" issue again. "Please retire this particular testing regime which seems to game-able via wealth and which further entrenches existing disparities," gets turned into and mischaracterized as, "Get rid of numeric ratings," because it's easier to argue against AND allows for an even more incumbent-advantageous solution to be implemented if it happens to be toppled.
If we went with the actual recommendation (e.g., to complete the analogy sandwich, "dismantle the current institution and establish a new one with a fundamentally different structure which allows for security/investigation functions to be carried out without the baggage of the previous institution"), something might actually change for the better, and we can't have that.