[seba_dos1]

I think it's important to understand that "being free" and "endorsed by FSF" are two completely distinct states. It's not enough to be fully free to get endorsed - FSF has their right to decide fully arbitrarily what's acceptable enough to endorse it and what isn't, and being technically free is just one of the aspects they are considering. Endorsement isn't technical, it's political.

> the FSF considers the whole OS nonfree

As an example, the FSF does not consider Debian nonfree - they even acknowledge that "Debian is the only common non-endorsed distribution to keep nonfree blobs out of its main distribution"; they just don't want to endorse it because it points people to nonfree software. As a user, I don't mind that it does so I use Debian, but FSF is free to not want to endorse it because of that.