nonguix is similar to debian's non-free sources. It's also maintained by many of the same contributors to guix. Enabling it is also similar to how you enable it for Debian. I have never seen anyone blamed or shamed for using nonfree drivers by the guix community, which I can say has been a very warm and welcoming community.

It's a little inconvenient but for example my Framework laptop Intel WiFi chip requires a binary blob and I want aware of this. Now that I am, I can make better hardware purchasing decisions. There are plenty of alternatives that don't require that blob and it's the only thing I need from the no free channel.