This is true in large part. Humans are social animals. "Monkey see, monkey do" applies to us as much as it does to chimpanzees. We love to be a part of trends, and to be in style, and to be in the in-crowd, and to be kept in the know -- in short, we love to be a part of the larger group. If nobody is telling us that they hate the politician we are listening to, we are less likely to be critical of that politician. On the other hand, if the video of the politician is filled with hundreds of mocking, negative coments from viewers, we are more likely to be critical of the politician. This is the power of Trump's rallies. They show that his support is massive right across America. Biden's and Hillary's rallies, on the other hand, were an embarrassment to the Democratic Party. By eliminating the down vote, and by excluding commentary, those who control the media can keep people ignorant of the prevailing popular opinion, which may vary well be diametrically opposed to that being promoted by the media.