He isn't worried about those people you mentioned, they are ranked below him. He can't fight Marty again so why not go make some easy money of a dude who has a lot to say about him. Worry about those other fighters another day.
I mean my boy Fiziev calling out Vince Vaughn makes more sense.
Colby just beat Mas, who is his first current top 15 win at WW , and there's guys like Khamzat, Luque, Muhammad, but you call out a LW???
Who exactly would wanna see this fight? Dustin is probably an easier matchup than Mas. Smh
The thing is that winning against big names can induce UFC to giving Colby another shot. He doesn't necessarily need to beat the top 5.
UFC will make a trilogy if it will sell.
As long as khamzat is in play though then he will leapfrog Colby.