No worries, it is not misleading because even with a proper conversion the problem you were underlining still exist.
Yes, although here we are wandering into a highly subjective territory and each camera almost needs a custom fix. The diagram highlights quite well the issue with a large chunk of chromaticities outside the spectral locus. They need to be gracefully brought back within it. You could do that with a 3x3 matrix like that @sdyer built for the Blue Light Artefact Fix LMT , but I reckon there is a need for a long term solution.
The figure is generated with Colour, here is a How-To to produce similar images:
Good question, in VFX we integrate the CG onto the plate as if it was shot by the camera, if the yellow on the knuckles is a feature, we would need to match it. Here, it would be hard with ACEScg as a large chunk of chromaticities from the camera is outside its gamut. I don’t know if there are standard practices for that as you cannot generate matching values with ACEScg in a renderer. I think I would handle those special cases in comp with some sort of gamut expansion. Keen to hear others opinion on that topic.
Cheers,
Thomas