It doesn't really benefit that much from it, especially as a large animal that's more than capable of just staying hidden. Most large animals don't waste energy on big spikes on their butts, no matter how many predators they have.
Also, there's a bit of a predator apocalypse incoming. Most of its ancestor's predators will be extinct shortly.
This post has been edited by Disgustedorite: Feb 26 2021, 10:35 PM