Near the end of The Force Awakens, the protagonists are on a rescue mission into the enemy's Starkiller Base when they confront Kylo Ren, the main antagonist.
At this point, Ren is in a fairly vulnerable position, and several of the heros are armed with blaster weapons with a clear shot at him. However, none of them fire; instead
Han confronts him face to face and ultimately gets stabbed by a lightsaber.
It seems to me, at least, that had all of them opened fire on the villain, there was at least a good chance they could have gotten past even his Force powered defenses, and saved a lot of trouble later.
Is there any reason (ignoring the out-of-universe reasons of "it would be boring") why no one took a shot here?