Situation is same. How you define "legitimately fighting"? When Rage have advantage they can decide who have "right" to fight with them but when Simians are in disadvantage they dont have right to pick his target? How many hits did Simians in return Sanc for hit cow and dragons? How many sing they gave for plan to "legitimately fighting" with sanc to make sanc wave them after send his army out?
Yes maybe you are right..its not same situation. Bio didn't double hostile rage but sanctuary double Simians.