OK, makes sense. You're still being sorta oddly pedantic about this. sRGB was for sure designed to reflect a phosphor set based on red, green, and blue primaries that absolutely were chosen for their correspondence to what most people reason about as primary colors, and the reason for that is that we have three cone pigments in our retina and those three tickle them more or less orthogonally.

So I don't get your criticism. Poster above wanted a set of primaries that corresponds to how the cones react. The closest you can get to that is an RGB space like... sRGB.

Arguing about which design point (phosphor correspondence or cone correspondence) is "real" or "derived" is IMHO meaningless pedantry at this level.