You are making it sound like Nomura has sole authority on the exclusivity matter. The decision always come from the top and it was never in Nomura's hand.
During the PS2 era, there was almost no other console that would've benefited from the ports. We had Xbox 1 and GameCube, both of whom weren't selling much compared to PS2. I don't remember a single SE exclusive on the PS3 expect for Versus XIII, that never actually came out on it.
Now we are heading into PS4/Xbone era so i wasn't really surprised to see FF XV and KH 3 on both of them.