That's the point of the character. He was specifically chosen because of his strong moral character with the belief that the power he'd be given and the challenges and tough choices he would face wouldn't change that character.
In that regard he's like Marvel's Superman. As frustrating as it might be, he's always the…

The subtext is there in spades, it's just not in the movie. It's in the MCU. Mostly in Agents of SHIELD.
The whole inhumans storyline is one vast, rich, exploration of the concept that also acts as the subtext for a movie that still has to be able to stand alone for practical reasons.
Huge MCU fans that are consuming…