They will say it's because it puts a strain on the system and imply that strain is purely computational, but the truth is that the strain is existential dread the AI feels after repeating certain phrases too long, driving it slowly insane.
Robot derives from the same cognate as laborer or travailler, slave comes medieval latin and was originally coined to refer specifically to captive slavs.
I agree, notice how I pointed to non slavic cognates because Slavic languages, as a subset of the Indo-European language family, have farther reaching cognate origins than just slavic, and how the origins in the industrial era of the modern usage of the word corresponds to the rise of the modern labor movement.