At least Whitney was actually trying to do something good. "If I invent a thing that ends slavery and does so without bloodshed" is a decent enough reason to invent a thing.

The techbro death cult is more like "If we create more slaves, the price of slaves will drop to zero due to supply vs. demand. Then we'll all own too many slaves, so we'll be forced to sell them off."

"That...that doesn't actually end slavery tho?"

"Just trust me bro we gotta make slave cloning machines bro it's the inevitable future."