And it's done frequently, and keys are cracked in anywhere from a week to a couple months for each disc. That, to me, is a sign of a broken scheme, semantic arguments notwithstanding.
This is about as bad an analysis of a DVD content protection scheme as can be offered. Publishers are trying to protect the release window, immediately after the publication of a disk, where they make the majority of their money. A scheme that costs rippers weeks-to-months to crack a disk is a spectacular success for them.
The "break" in BD+ will be when someone finds a way to write a ripper that seamlessly handles BD+ refreshes, just like the players do. It'll happen eventually, but it hasn't happened yet.
