How much do these factors matter, though? Similar arguments can be made about uselessness of the like button. Some press it to indicate good, relevant content,

How much do these factors matter, though? Similar arguments can be made about uselessness of the like button. Some press it to indicate good, relevant content, some press it to support the topic, some like factual content, some use likes for later reference in "liked videos". If you pivot a bit to Facebook videos, you can see heavily "liked" videos where huge portion of top comments are literally some form of "waste of my time", "idiotic video" and so on.