The Enneagram has less predictive validity than the system you’re criticizing. If you think personality theories flatten mind-space into flavor variations, then the Enneagram sadly is just the same typology without using personal traits as the discriminating factor. Minds tends to differ architecturally, not typologically.
We all have different representational formats, different processing modes, different gating functions on identical inputs (which has something to do with genetics and receptor expression). Types can’t capture that because types are static and minds are generative.
Yes, thanks for catching that, that graph is from an earlier version that had a data leakage bug. The current model and benchmark are in the linked repo. I would really appreciate if you could replicate the results. The actual result is 1.596 nats, not 0.022.