> Linux distribution is a distribution, not a vendor.
I don't understand what you mean here. Do you think that the Debian is not trying to provide a full OS, they are just curating a set of popular packages?
I think this is patently false, as most distributions typically take clear decisions to standardize and maintain particular OS components, such as choosing a particular libc (glibc in most distros, musl in Alpine), choosing a particular init system (systemd vs System V), particular network management demon etc.
However, instead of taking additional time to create and commit to a backwards compatible Debian SDK, Alpine SDK etc, they then package all of these OS components the same way they package popular software.