If you want to go the stochastic parrot route (which i dont fully biy) then because statistically speaking a request paired with please is more likely to be met

If you want to go the stochastic parrot route (which i dont fully biy) then because statistically speaking a request paired with please is more likely to be met, then the same is true for requests passed to a LLM. They really do tend to respond better when you use your manners.