A writer writes what other people only think.
Most of the time, tough, combative, adversarial dialogue is much more exciting than physical action.
To create tension, dialogue needs to be stretched out. That is, characters should not be immediately responsive.
A reader's emotions can be sparked with few words. That's the power of dialogue.
Dialogue is a lean language in which every word counts.
Our instinct as human beings is to provide answers, to ease tension. As writers our job is the opposite, to create tension and not dispel it immediately.