Sunny definitely knew what the smart decision would be.
The smart decision would be to concentrate on weaving for now, slowly consider the potential perils of venturing into the Shadow Realm, and make thorough preparations before entering the Lantern.
For example, he had to decide which of his incarnations would explore the Shadow Realm. Would he send the Lord of Shadows and his three companion shadows, to have as much power as realistically possible in the current situation at his disposal there? Or would he send a single incarnation as a scout, to reduce the damage to a minimum in case it was destroyed by an overwhelming threat?
It would also be best to consider many things, do extensive research, consolidate his recent breakthroughs, and make arrangements before passing through the Gates of Shadow.
That said…
'Ah, to hell with it.'