Probably not, but I don't think him or anyone expects a PPV main event. A fight night main would be fine though. Plenty of fighters who don't have any great wins have main evented those.
I mean, who had Luque beaten? His best win is the ghost of Woodley.
Strickland's another great example. Look at him and the opponent's he's main evented against. He himself? His best win is probably Jack Hermannson, who doesn't have any great wins.
Strickland's last two fights have been main events. He Nassouradine and Abus. Neither of those dudes have beaten anyone. Rountree actually has better wins than both of those guys.
I say give it to Rountree just because he's probably the most exciting finisher in MMA. Some of his finishing sequences have just been total brutality. That time his opponent fell to hands and knees and he just soccer kicked the fuck out of his sides. Or when he dropped Roberson, side kicked Roberson full force while Roberson was on his knees, and then tried to death stomp him and missed lol.