> 3. Stockfish claims they haven't released their NN weights. But that claim makes no sense. They distribute the weights with every copy of Fat Fritz. Otherwise, the product wouldn't work.
What about that claim doesn't make sense? Before you have stockfish, first you need the source code of the engine as well as NN weights in a human readable model file. Build system and compiler takes both of these, and turns them into final executable binary.
Chessbase distributes Fat Fritz final binary executable. To claim that final binary satisfies weight reveal demand makes as much sense as to claim it also satisfies source code reveal demand. You can't recover either from the binary, without significant decompilation and reverse engineering know-how.
I already wrote this much in your original post. If you disagree with this, why haven't you provided a rejoinder there?