Because Ilia is an undefeated two division champion including the weight class Islam was champion in. Because the betting line between Ilia and Islam would be a lot closer than Usman and IslamIllia makes even less sense than Usman. Illia has zero defenses to his name, why tf would the UFC let him move up? Yea if Ian beats belal it should be Ian IMO but if Ian wins in a boring ass way later today they'll probably end up giving it to Usman, especially if Islam pushes for it.