Ubuntu is NOT a Community Project
When Canonical Ltd. chose to create Skunkworks, Ubuntu ceased being a community Distro. If there are gradations between one extreme black (proprietary) and white (community, open source) Ubuntu has moved in the grey scale towards black ever so slightly.
There's no rationale for it. No amount of discussion will change that Skunkworks is a process to 'conceal' Canonical's operations.
Unlike Ubuntu, Fedora is a completely open, community Distro. While it is true that Fedora is foundational to Red Hat Linux, there are no hidden plans, no obfuscating, no prevarication with the Fedora community. What you see and I mean 'see' is what you get.