How have we become a pure "viewing animal" today?

At the Shanghai Book Fair, people were scrambling to buy books, but they were also reflecting on the impact of online reading on us compared to paper reading. Today, algorithms try to precisely push the information you are interested in to you, the headlines are old-fashioned but still tried and true, and the articles we see are getting more and more pipelining. How did we become a pure "viewing animal" when reading was edited by algorithms, and why are social networks filled with extreme emotional words that take their own stand? What do we lose by not reading for too long? Where are our own lives by "watching how others live"?