Yes, since Go is a very simple game. Making a proper driver for much more complex domains like engineering blueprints is not something we know how to do today.
Edit: Also you are missing the Go engine in that comment, it can't train without a Go engine to train against that evaluates the results of each move. That Go engine is a part of the training algorithm and thus is also a part of the driver code, you would need to produce something similar to train a similar AI for other domains. We don't know how to write similar blueprint engines or text evaluation engines, so we can't expect such AI models to produce similar results.
Edit: Also you are missing the Go engine in that comment, it can't train without a Go engine to train against that evaluates the results of each move. That Go engine is a part of the training algorithm and thus is also a part of the driver code, you would need to produce something similar to train a similar AI for other domains. We don't know how to write similar blueprint engines or text evaluation engines, so we can't expect such AI models to produce similar results.