Why do you think that? Think that Fury will just spoil the fight?
Fury's not exactly known for being in exciting fights is he? And yeah, I think the way for him to win this one is to spoil it a bit. Remember the Wlad fight was not exactly a thriller was it? I know he went on the front foot against Wilder, but Joshua is a different animal and he'll be eating uppercuts all night if he tries that, so it will be back to the awkward jerky style from a distance and then grab him if he gets close.
Joshua has obviously been a bit more entertaining, but Fury had got a head like a stegasaurus so I don't think Joshua's going to knock him out (although he's done it before!), so I think you'll see Joshua in the Ruiz 2 mode.
Fury from the Wlad fight versus Joshua from the second Ruiz fight is an absolute stinker unfortunately.