It does though, Maslow's just being a dick
If you have no curtains, then it's covered by Tier 2: Safety. Your nest isn't secure if anybody can just look into it.
If you have curtains but don't like them, it's covered by Tier 4: Esteem. If you don't like your curtains and they make you feel bad, it affects your self worth. Doubly so if you're concerned your neighbours might think they're shabby and judge you for it (this is another issue to unpack in therapy)
Also, although the pyramid is a popular way to express it, Maslow himself never used a pyramid to describe the hierarchy.
Now that I've ruined it by over-explaining: It was a funny comic, I laughed.