Google does not have that kind of superior legal negotiating position. Copyright owners use ContentID and revenue sharing in lieu of suing Google for knowingly participating in copyright infringement. If Google locks out a copyright owner from their alternative to legal disputes, the next step is the copyright owner sending large quantities of mail to Google's legal department to get handled manually. Complete non-starter, Google needs to have a highly automated system with copyright owner participation, and as I understand it copyright owners are forced to opt-in if it is provided.