Honestly, I don't think he has the awareness or attention span to be an accurate mole if he's limited to working from memory.

He’d probably remember half the secrets incorrectly and get North Korea to blow itself up.

He’s such a narcissist all they would have to do is stroke his ego

This actually highlights one of the problems (as a strategy, ignoring humanitarian concerns) with torture- whether or not someone will break has nothing to do with whether they have real, useful information. Once they break, they will say whatever they think their captors want to hear.

The primary (strategic) alternative is to befriend them; convince them you're on their side. A tactic that has been shown to be extremely effective on Trump. He'll gladly spill whatever he thinks he knows as soon as they say something nice about him.

Good point. We should maybe abduct both of them, and turn it into a reality tv show. Like The Truman Show. but real.

Probably. But, like. just hear me out. They'd hate each other's guts. It'd be like Grumpy Old Men, except they're not fighting over a woman, and they were never actually friends.