>But the actual medical system does not treat them as having anything in common, let alone as being homogeneous.

That's not really true. Not to mention the very TFA, and the research that led to papers like it, is based on the opposite.

I mean you can literally upload your genetic methylation variants and bloodwork into Gemini and have it one shot a custom treatment plan for you, how much more personalized do you want? Obviously if you want hand holding from the medical system you can pay a psychiatrist or a functional doctor to do the same thing, but at this point the idea that treatment isn't personalized enough is frankly absurd.