Daley stopped defending. Diaz didn't. Daley was pretty much knocked out actually. You need to find a good angle of the finish.
BJM knows Diaz is a tough bastard. Nick was intelligently defending himself
Daley never gets wobbled. He was pushing off with his legs but he wasn't blocking with his hands, and BJM looked into his eyes before he stopped it.
Is pushing off with your legs and not trying to block the punches with your arms intelligent defense while on your back? Not really. Daley was just waving his arms around like he was confused.