Makes sense. The G in GCC is for GNU right, GNU as in Stallman-style Free Software. The GPL operates based on copyright licenses. If LLM output can not be copyrightable (as the courts seem to assert), then it can not be a significant part of Free Software.
courts assert LLM can't HOLD copyright, as in it is not an entity that can own something and go to court over such ownership
nothing is said about you the user holding copyright over result of tool use
I don't know why this take is buried -- this is exactly the pertinent point to all of this.
Or if LLM output is copyrighted or sourced from copyrighted code - they can't take that risk, lest they face another "Google LLC v. Oracle America, Inc.". I think that lawsuit caused huge waves in the open source communities.