You don't know what a gatekeeper is, stop using the term.
Five of Nate's losses came before he was 25. Two of those he arguably beat against top talent.
His next six losses, two have come from top WWs, the other four have come from LW champions, one of them in an actual title fight before Conor was even in the UFC. All of these happened before he was 27 as well except RDA and Conor.
Losing to a guy two weight classes ahead on short notice also proves nothing. Keep staying bitter, bum. Your champion is back.