Because suddenly there is a scene with Jabba himself, and …. nothing. He’s got Boba Fett with him and yet no one tries to kill Han or capture him or anything. There is no urgency. All the plot points that were just conveyed in the cantina are repeated, but without the urgency or high stakes. Han left the cantina with a job that was going to save his neck, and he barely escaped with his life. He thinks he’s got to get out of there quick before he’s captured or killed. He’s so paranoid that he thinks the storm troopers that are after Luke are after him. Yet now there is this scene with Jabba where Han is all in charge and stepping all over Jabba’s tail.
I've always been a little on the fence about the revised editions - many of the additions enhanced the movies enough that I didn't mind some of the clumsy bits. But now I've had this pointed out to me…
I'm no longer on the fence.