Cinemetic quandaries

When Darth Vader is chasing Luke Skywalker down the trench of the Death Star in Star Wars: A New Hope, he notes that “the Force is strong with this one.”

Shouldn’t he be more alarmed with this observation?

Less than twenty years earlier, Vader slaughtered every Jedi youngling in the Jedi Temple, effectively ridding the galaxy of future Jedi.

When he encounters a pilot who is strong with the Force, doesn’t he have to wonder why this guy even exists? _____________________________________

Chief Brody blows up the shark at the end of Jaws by firing a rifle at a tank of compressed air exposed in the shark’s mouth.

Moments later, Hooper appears, emerging from his hiding place on the sea floor. He’s presumably watched the shark explode since he emerged seconds later, but he doesn’t ask Brody what happened.

This makes no sense. The shark just exploded, and Hooper has no idea how Brody pulled it off.

Hooper has no idea that:

Brody tossed the tank of compressed air into the shark’s mouth moments before.
Rather than swallowing the tank, the tank remained dangling in the shark’s mouth.
Brody managed to find a high-powered rifle as the boat sank underneath him.
Brody climbed to the top of the mast of the Orca.
As the boat sank, the mast came even with the waterline at a 45-degree angle, allowing Brody a clear shot at the air tank.

How are Hooper’s first words not, “What the hell just happened? How did you do that?”

These are the things that keep me up at night.