Because I suspect that the CRI makes very little visible difference. I have tried to replicate the obvious differences in the photographs of hands under different CRI ratings, and in real life, the only thing that makes a noticeable difference is temp, even tint is only significant when white wall hunting. I realise thesr things are subjective, and that cameras bring different factors to the party,but this thread in particular has convinced me that it is not just me, it would take a lot to convince me now that CRI above 70 is worth pursuing.
Perhaps the single most blatant demonstration is my bedroom. The walls are a light cream colour, and the ceiling plain white. None of my high CRI non-neutral lights can illustrate that they are different colours, they look the same.
ALL of my neutral lights clearly show both colours distinctly.
What is the use of high CRI if it cannot show the difference in two colours side by side?