Fantasy wish-fulfillment is a bit of a theme with the movie.
At the beginning, Anderton is obsessed with spending time getting high and immersing himself in holographic images of his lost son. This speaks to his personality. The guy who supplies the drugs tells him “Sweet dreams.”
Later, he gets help from the neuroelectronics guy who runs “Dreamweavers,” which is all about wish fulfillment. When we first meet him, the proprietor is talking to someone who bady wants the experience of killing his boss.
It’s already been mentioned that the guy at the detention center says that it makes “All your dreams come true.”
The last thing that his son says to him in the obvious dream sequence is “The more you want to believe something, the easier it is to be fooled.”
It seems to me that Anderton gave in and let himself be fooled.