Mmmh, I think the word "ignorant" says it well enough, to be honest. You see, ignorant is not the same as "A child who has not yet seen and does not yet know."

To be ignorant is to specifically ignore truth and goodness when you see it. Thus, I think all ignorance is inherently willful.

And a person with no will, or who simply cannot learn, is perhaps either a Forrest Gump who does good because that's his simple nature, or a Lenny, who breaks rabbits and kills a woman, not knowing exactly how or why.

But I suppose "willful ignorance" does indeed happen if you take someone and point with your finger at what you want them to see, and right before their eyes, they see it, and then they say "I see nothing."

On the other hand, perhaps the other person is simply delusional. Either way, I certainly don't think you're wrong in the general sense, so consider this only a discussion, and not an argument.