The whole point of social media is for users to generate the content and to decide for themselves what makes content good or bad. In the past, advertising would fund the service, targeting specific demographics. It was never seen as endorsement of specific content.
Now advertisers want to start dictating the terms, to decide what specific content they approve of. Social media starts to look like traditional, sponsored, top-down media. This defeats the whole purpose.
Social media is selling out, and we are mistakenly cheering this on as a good thing.