I was involved in a few of those committees, and sadly I have to agree.
The reason Khronos is often so slow to adopt features is because how hard it is for a group of competitors to agree on something. Everybody has an incentive to make the standard follow their hardware.
A notable exception to this was the OpenCL committee, which was effectively strongarmed by Apple. Everybody wanted Apple's business, so nobody offered much resistance to what Apple wanted.