Well, I’m okay with old concept of ads. But it was them that decided that ads must double dip with customer information and it was them that decided that ads viewed by people who are engaged to the ads doesn’t count as ads that was ‘seen’.
Continuous race to the bottom since then.
Disadvantage of said system for Google would be the fact that if you do that, people can skip ads much faster and they won’t be able to do any tracking of interaction at all. For advertiser’s point of view, that would be just worse version of TV commercial.