But then something has to give. North Korea doesn't need to give in to anything.
How do you know? Something brought them to the table. Maybe it's a ruse, and history tells us that's entirely possible, but that doesn't mean it's not worth giving diplomacy a chance.
Because Kim Jong Un has said he won't give up his nukes.
Trump has said he won't withdraw troops from South Korea (in order to please the North Koreans, he said he'd do it if South Korea didn't do as he wants though. More contradictions from Trump).
Trump can't be seen to lose.
Kim Jong Un can't be seen to lose.
So, you want a deal where someone has to lose in order for it to happen, and neither side is going to accept that.
It's not going to work.
It's a show. Nothing more. Both of them are in the press, both of them looking good, smiles, doing diplomacy (sort of).
They come away from a meeting with "concessions" which are like kids going "I'll trade you Dan Marino if you give me your Dan Marino card".