The thing I never understood is why is "demonetization" black and white. Why not by default have a filter on ads that prevent them being shown on any "unsavory"

The thing I never understood is why is "demonetization" black and white. Why not by default have a filter on ads that prevent them being shown on any "unsavory" content but allow the advertisers to opt-in to this. I'm sure that many brands would be fine with their ads being shown next to sexual content they can just uncheck the box "Don't show my ads next to sexual content". Other brands may be fine with violence and others with both. Obviously getting your video flagged as sexual, violent or whatever other default-disabled category would still greatly impact your profits as you will have less ads bidding on your video but it is far better than the 0 revenue of today.