Considering how they phrased it and the fact that no phone has the FSF's RYF certification I would tend to think it's because it's currently impossible.
That they took the time to add a note about RYF certification and that they will continue to keep the FSF up to date on this shows that they do care about this. I honestly don't think there's any more you could ask of them.
That they took the time to add a note about RYF certification and that they will continue to keep the FSF up to date on this shows that they do care about this. I honestly don't think there's any more you could ask of them.