If there are a total of 2256 combinations. one combination of 24 words has the same chance of being picked than another combination of 24 words. This probability is 1 out of 2256 whether how it was generated if each word was picked randomly.
If there are some unconscious but common psychological patterns/biases in your choice, don't you think someone or something(like an AI) could discover and exploit them one day, and instead of having to check 2
256 combinations, he will just need to try 2^25.6 ones for example?