Because big-budget films and TV are increasingly fascist. They focus on the nuclear family as being qualitatively and quantitatively more important than anything else. Within that context, the plot inevitably seeks to establish the absolute uniqueness and superiority of the individual. Superhero stories are an extremely good fit for this narrative.
Deep down, we all know that having a family is exactly as great a biological accomplishment as taking a nice shit in the morning. Dad came; mom squeezed one out. Lampreys and slugs do basically the same thing just as successfully. It's not special. We are not special. Movies and TV push the lie that we are, and we recognize the lie and we have begun to resent it and to be unable to suspend our disbelief.
Youtube is enormously better because it discards the lie. It's just some dude earnestly trying to figure out why a plane crashed or how to run Doom on a smart toilet. It's refreshing because it's real. It's interesting because it's real and it doesn't alienate us by spending all its time trying to shove the big lie down our throats.
