My thought is, the bill once passed is passed, according to the Constitution, and the Concurrent Resolution is just a procedure that stays the enrollment (transmission) of the bill to the President. If the Concurrent Resolution fails, you still have a bill that was, in reality, passed, even if the Congressional Rules say it can’t be enrolled. Now what is to stop Nancy Pelosi and Joe Biden from signing the bill and sending it to the President anyway? Only Congressional rules. This is pretty dangerous territory.
You could be right - thanks for that insight.