If Foa Foa got the rock and they go home, John would have been voted off 5, with Laura, Dave, Monica, and the other guy remaining.
With Laura out, John gets voted off 6 or 5, with a very shady and powerful Russhole remaining, followed by the rest of the three... That's a potential for 4 or better.
Going with Foa Foa is the better choice.












