Doesn’t need to be “intelligent”, it needs to be fit for purpose, and it clearly is.
The closest comparison you made was to the cyoa book, but that’s only for the part where it gives me options. It has to have the “intelligence” to decipher what I’m asking it and then give me the options.
The fact it can do that faster and more efficiently than a human is exactly what I’d expect from it. Things don’t have to be groundbreaking to be useful.