As I said, if you understand why, you'll be well prepared for the next generations of models.
Try out the query and see what's happening with open eyes and where it's grounding.
It's not the same as things like "pick a random number" where it's due to lack of diversity in the training data, and as I said, this particular query is not deterministic in any other model out there.
Also, keep in mind Opus had RLAIF not RLHF.