I really don't know how everyone else is reading this, but it seemed right to me.
DC characters ARE intended to be bigger than we are. That's the reason graphic novels like Earth One annoy the bad place out of us fans and start us on a 'they are trying to 'marvelise' Superman' rant. We see it exactly the same way.
And he's right in the sense that it's the relatable aspects that you should be using as your base. That's something that Snyder pretty much keeps consistently repeating about MOS too.
I don't see why people think it was him being arrogant... I just don't see it