> Optimality is contextual. You can engineer a context that motivates suboptimal decisions in fact, though it isn’t easy.

I agree with your post but I'd just like to nitpick that this first phrase is not true, the equilibrium point is independent of what your opponent does. I'm pretty sure you know this as you then go on to describe not a context where the equilibrium changes but where it becomes hard for humans to find the equilibrium.

So we agree, it's just a small nitpick of how you worded.