Anyone else notice this?

Why does almost every single like villainess and or like just isekai story HAVE to make the main character come from some important noble. Like oh.. They're a commoner. Woah! They're actually really strong? Mm that's never happened before! and then you find out "OMG it's the dukes son???" It completely takes away from the message that you can be strong without noble blood. "He's the dukes son! Now it makes sense! That's why he's so strong!" Or you find out they're actually like a fucking saintess of something. Soooo annoying.