Don't be glib.
That scene has a lot of emotional and philosophical depth. On the one hand it deals with a father's love for his son, how he is willing to put his son's life and well-being above anything else. And do remember this is coming from a couple who couldn't have any children and by nothing short of a "miracle" are given a son. And a very special one at that. On the other hand, it deals with a man's understanding of how people and the world in general react to "supernatural" phenomena. He knows that his son will be either idolised or demonised, or both. And he's right.
Those thoughts are at the core of Snyder's movies. The love of parents for their children and the sacrifices they are willing to make for them (Jor-El and Pa Kent both sacrifice their lives for their son) and the trauma of losing one's parents (Clark continually mourns the loss of his father and misses his pragmatic and sober worldview to help him deal with what is going on around Superman, not to speak of Batman's obvious trauma which is well known), and the reaction of the world to super-human beings (and vigilantes) are themes that are explored both in MOS and BvS.
Are those ideas well presented, well written in the movies? Clearly, for a lot of people not, but I do see them and appreciate them.
You choose to just see a father telling his son to let others die, but there is a lot more to it, whether you want to acknowledge it or not.
