Is 'addiction' to social media the same as an addiction to heroin? No of course not. But it is evident that some people have great trouble to not have it control their life to a certain degree. If addiction is defined as "a brain disorder characterized by compulsive engagement in rewarding stimuli despite adverse consequences" I think you could argue that some people are addicted to social media. Just because you're not injecting something into your bloodstream doesn't mean it can't be an addiction, many lives are destroyed by gambling addiction for example.
Also from the blurb:
>discover who really has the power to break these supposed “addictions.” (Hint: It’s you.)
It's always you who has to break the addiction. I don't see how this makes it an "addiction" instead of just an addiction without the scare quotes.