Well more than the physical act of sex, the films are lacking any sort of sensuality. There's no intimacy, whether between friends or family within the films. Even when there's dramatic loss, such as that particular scene in Endgame, we only know that this relationship is important because the two characters relayed quips to each other, not because of any sort of emotional intimacy.

Even kids shows feature romances. Have you not experienced love or attraction as a major motivator in your personal life, even as a child?

You jumped from "neutered and almost sexless" to romance which is something different, especially when considering kids potentially watching movie (sex gives you higher rating). And no, sexual attraction was not motivator majority of the time, definitely not as a child.

Speaking of romance, I dont need romance in the movies. Not every movie needs it. Most relationships in real life are not romantic, most cooperating groups of people dont actually have couple in them. Repetitive same-stupid-hero-falls-in-love with girl that is there to be fallen in love with plus some excuse is worst then no romance.