Telling angels about free will is rather like teaching poetry to fish.
This common phrase was used in the ranks of the Jedi when some crap was happening. Obi-Wan has used it, of course. Qui Gonn Jinn has used it. Darth Maul, right before his untimely death, used it, but he used it too late... and painfully, spitting up blood as he did so. Twi'lek girls have used it before being chucked into Mr Rancor's garbage chute for dinner. Look's like Sammy's home for supper.
Often, it was much too late much too late.