Originally posted by: Deadfire

Nice!...

I'm thinking somewhere along the lines of that because a Captain has so much spirt power that hollows (and i mean alot of them) would hunt them down. As Hollows go after the biggest source of spirt power and as such powerful shinigami limit their powers so they do get a shit-load of hollows after them (Of course they could most likey Own them)

I mean a shit load of hollows showing up would really screw up with the human world remember the challage Icihgo had in the beginning?

That theory probably makes the most sense