KDE has far too much surface area to test and support (as in end user support) effectively. Gnome may not be as flexible but it makes for a much smaller target to be able to reproduce and triage issues.
If people want KDE they can install it. Making it the default is short sighted and doesn't align with, or help further, the goals of the Fedora project.
If people want KDE they can install it. Making it the default is short sighted and doesn't align with, or help further, the goals of the Fedora project.