Characters
Sully, you're the only guy I know still dumb enough to believe in luck.
— Carl · Nobody's Fool
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker teases Sully as the only person they know who is still foolish enough to trust in luck. It reads as a ribbing insult, calling the belief naive, while also singling Sully out as stubbornly hopeful in a way nobody else seems to be.
Context reviewed