Live programming music using tools like SuperCollider is/was a (very niche) thing. Someone is on stage with a laptop and, starting from a blank screen that is typically projected for everyone to see, types in code that makes sounds (and sometimes visual effects). A lot of it involves procedurally generated sounds using simple random generators. Live prompting as part of such shows would not seem entirely out of place and someone might figure out how to make that work as a performance?
SuperCollider enthusiast here, I think you missed the "is no different than" part. Working with SuperCollider is very different from playing any instrument live, and I doubt that'll change.
Where playing an instrument means balancing the handling of tempo, rhythm and notes while mastering your human limitations, a tool like SuperCollider lets you just define these bits as reactive variables. The focus in SuperCollider is on audio synthesis and algorithmic composition, that's closer to dynamically stringing a guitar in unique rule-based ways - mastering that means bridging music- and signal-processing theories while balancing your processing resources. Random generators in audio synthesis are mostly used to bring in some human depth to it.
