Clearly no, because both activities couldn't be more different. I dont sit down in the evening and spend 2 hour scrolling through social media. Why should I? I might scroll through my feed while waiting for my dentist appointment, because it is a nice way to pass the time. But reading a book takes time and attention. I do that after work, at home, with enough time at hand.
How you consume social media is not what everyone does.
For example my SO spends hours on end on Facebook. Depending on whether you consider it social media I sometimes sink a lot of time (think hours) on YouTube. And that's time we're not spending on reading.
In light of this the question doesn't seem as twisted.
Who asks such twisted questions anyway?