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The first link is about consciousness. The second link is that language is not thought. The third link is that intentions as "discrete mental states" may not be found in the brain.

This does not necessarily disprove the existence of an world model, and these papers are not directly dealing with the concept. As shown with how LLMs work, the world model (and how the brain thinks) may be more implicit rather than explicit philosophical/psychological constructs within the neural net of the brain.

As opposed to neural nets and LLMs, neuroscientists and the like have no way of taking out a human brain and hooking it up to a computer to run experiments on what our neurons are doing. These software are the next best thing at the moment of determining what neurons can do and how they work.

Perhaps there is a dialectical synthesis that can be made of your position that I interpret to be something like "there does not exist discrete cartesian states within the brain" with how neural nets learn concepts implicitly through statistics.