Datasets contains lots of people sharing particles simulations in various ways, with a bunch of people replying "that's so cool" and similar, so 10 years later someone asks an LLM for "cool thing" and "particle simulations" rank pretty far up when it thinks about what others have called cool.
Also the reason LLMs are positive, enchanting, pleasant, glorifying, demagogues.
Not because it's skewed tone in the data. They are acute politicians.