Nonsense. Why am I able to file a bug in Fedora and a Red Hat engineer will work on it then?
They respond to X bugs right now because right now X is still in versions of RHEL they support. When that is no longer true, do you really expect them to continue supporting X on other distros?
but if you ask for a bugfix on Xorg needing a large amount of time to spent on it probably not going to be worked on...
Not including xorg in RHEL doesn't prevent people from running xorg on rhel. The question is, why would you ? Red Hat is aiming at the server market and the cloud, not the desktop.