Do you realize that Nate has always respected, loved and followed his older brother ?
He'll be the first one to tell you about how important their brotherhood is.
No matter how well he does in his career, Nate is clearly fine with being "Nick Diaz's younger brother".
A lot of people talk about this whole dumbass concept of "growing out of another person's shadow", but guess what ?
Nate doesn't care about that shit because this is his brother, his own blood, that we're talking about.
When the Diaz brothers didn't have shit, Nick was the one always protecting and looking out for his kid brother. Have you seen how glowingly he talks about Nate ?
Nick would die in a second for Nate and Nate knows that very, very well. That's why they have each others' back like that.
Damn, I wish I had a "ride or die till the bitter end" sibling like that.