You're storming the beaches of Normandy. You duck behind cover. Suddenly a shot rings out. You're dead. The kill cam reveals you were killed by a human-controlled enemy, standing on a seagull in the skies above. [1]

Unfortunately, humans will find advantages that shouldn't be used in any sort of game that tries to build a believable world.

That isn't to say it's a bad idea. You'd just have to design the game with human enemies in mind. I was very interested in The Crossing [2], which incorporated that of mechanic. Unfortunately, it was canceled. :(

[1] Not a made-up problem. https://youtu.be/UfZFHdywYLA

[2] https://en.wikipedia.org/wiki/The_Crossing_(video_game)