Earlier quoted context omitted.
A lot of words for "yes they will insist on fragmentation"
Linux userspace is defined by fragmentation. Linux users can't even unify on a distro, such that significant swathes of software are incompatible for some users despite everyone using the same kernel. In that environment, and also just in general, why is anybody obligated to contribute to a specific existing project rather than building their own?
If you use Linux like MacOS and only run static binaries and containerized programs via things like flatpak everything is fine.
It's totally possible to treat the distro simply as a thin base layer and get everything else from flatpak and the various container hubs. It does work great.