Rarely there are standards bodies that aren't controlled by companies and their interests.
If they allowed OpenGL to flourish, it would ultimately be controlled by either Nvidia, ATI, PowerVR or someone else in the interest group to suit their hardware. Somebody has to pay the engineers.
Look at W3C, if is practically controlled by Google, and they only do what suits their needs, the way they want.
Look at Bluetooth, Apple is controlling the thing, and now they are releasing a newer version that's selfishly taylored for Apple to sell expensive headphones probably with patented methods, which they will use to protect themselves in court in case someone goes on a patent war against them.