[yyyk2]

Well, all it says that you shouldn't promote it on the "official channels" (i.e. the mailing list and the #guix libera.chat channel). Guix, the package manager itself, does not make installing non-free packages any more difficult than free packages. I suppose it could be said that Guix (the project) makes finding non-free packages harder, although anecdotally I will say that nonguix is the first thing I've heard about guix, since it seems to be the most controversial part of it.

[throw10920]

While it's technically correct to say that the software itself does not make it particularly difficult to install non-free packages, it also doesn't come with non-free repos when you set it up, and the documentation and official support channels intentionally lack information on non-free repos. As default settings and documentation are a critical part of a software project, it still has the end result of making it harder (much harder for non-technically-inclined users) to do so.