I am not a package maintainer, but if I recall correctly, this is a benefit and not a desire.
I believe one of (several) reasons for this licensing decision was to stop third-party groups from monetizing the documentation at the expense of the project. IIRC, several commercial sites had mirrored outdated versions of the documentation and used advanced Search Engine Optimization techniques to overtake the rankings of the official and current documentation. This is a common plague to Open Source Projects.
IMHO this is a benefit because the software and documentation change often, and should be installed or upgraded using the Python Package manager. The official installation instructions (
https://docs.pylonsproject.org/projects/pyramid/en/latest/narr/install.html) target package manager installations, not operating system installers.