A duplicate file in minecraft's default data exists at "minecraft:village/plains/villagers/unemployed". While "unemployed" villagers are technically used for baby villagers, entering the aforementioned filepath into a structure block generates a nitwit, not an unemployed villager.

What I expected to happen:

The "unemployed" villager would not be the same as "minecraft:village/plains/villagers/nitwit".

What actually happened:

It is the exact same as "minecraft:village/plains/villagers/nitwit"

How to reproduce:

1. Place 2 structure blocks on the ground
2. In one, enter "minecraft:village/plains/villagers/nitwit"
3. Load the structure, and examine the expected nitwit villager on top of a jigsaw block with a target pool of minecraft:empty, an attachment type of minecraft:bottom, that turns into minecraft:air
4. In the other one, enter "minecraft:village/plains/villagers/unemployed"
5. Load both structures