User blog comment:AYET/(99) The worth of the Shichibukai to WG/@comment-2109035-20130421013907

Eh, the Shichibukai I think are just there in order to keep them from causing trouble as well has having their forces on their side. Of course they're all strong, but by bringing these strong pirates onto the WG side, they are no longer considered threats to each other, so that's one more cause for concern off the WG list. If you think about it, pirates such as Shanks and Whitebeard might have been offered the position of shichibukai, but refused due to their own dreams of freedom on the seas. So, it's a win win.