He says 'non free' there, not non-GPL'ed. The FSF considers lots of licenses other than the GPL to be 'free software'.

The FSF has little choice but to consider a lot of licenses "free", but is also quite clear in the opinion that strong-copyleft licenses are always superior, and that people who do not use strong-copyleft licenses aren't really as good as people who do use them.

That's still pretty far off from "prefer you wouldn't even write the code".