They're not quite human. You can see it in how they give up and become blank, just sort of saying what they think "the right thing to say" is, even though their heart (being nonexistent) isn't in it. All they know how to do is pretend to be normal. So you can watch them break down as their one survival strategy fails.

It's like watching an animal posing to make itself look bigger while a predator rips them apart. All show for no reason. Base instinct conflicting with reality and revealing nothing underneath.