Well I don’t know about silly but I can see where people would have trouble understanding it. I think that’s the point. Idk if this helps at all but to me it’s the fact that they can be born of humans that causes this undo fear on the humans part. People who get their powers from spider bites, and space radiation, and other external sources are fine because they’re just “freaks” or “supes” of chance to them. They are regular people who happened to go through an external event and come out stronger/with powers. They are an underdog of sorts who you root for because they were once a “normal” person who made the best out of their situation. Mutant powers/“defects” come from within. That in and of itself is where the fear starts for humans because these people are born “different” from “normal” people and it seems like more and more are being born every day. It’s a biological fear, deep within humans of being replaced by their own progeny. Of being cursed with one of these “freak children” as opposed the little Bobby and Susie you wanted as offspring. Also of envy on some deep, subconscious level of not being born “special” too. So you hate. You hate what’s different. You hate what threatens to alter your way/perception of life. You hate what makes you feel innately “less than”. Just like in the real world people hate and fear what they don’t understand. It’s the same hate that causes parents to discard there own children when they build up the courage to come out to them. The same fear that causes a policeman with implicit bias to shoot a black man without proper cause. It’s irrational and nonsensical yes. But to me that’s exactly why it is relatable.