It is impossible to describe all situations in the rules.
Wise words. The misunderstanding of this principle leads to all those infamous, idiotic lawsuits in the United States about a cat dried in a microwave, and so on.
You always need to look at everything through the prism of the situation's reasonableness.
300-500 movement points can be decisive. And if it was really impossible to kill even one dragon in an entire turn, then what is there to talk about?