Yea. They put a lot of emphasis on Lucca treating Robo as a person. I don't think she'll like, killify him to make a circuit which is basically a password lock, totally WASTING Robo's intellect.
The reason it's called the Prometheus Circuit is probably symbolism if anything. We have the Frozen FLAME, and Prometheus was the Titan that gave humans FLAME! The Prometheus Circuit, which makes it so only the Arbiter can access the flame, is taking the Frozen Flame from FATE (God) And giving it to Serge, a mortal.