You’re conflating game engines being open source with the games themselves being proprietary. Proprietary products can use (some) open source things, but it doesnt make the end product open source.
Given that LLMs literally need the training data to be worth anything, releasing the final model without training data is not open source.
They literally did exactly that. Show me the training data. If it has been provided under an open source license, then I’ll revise my statement.
You literally cannot create a useful LLM without the training data. That is a part of the framework used to create the model, and they kept that proprietary. It is a part of the source. This is such an obvious point that I should not have to state it.