In boxing there's something called ring rust. Tyson fury, considered by many boxing fans to be the greatest HW ever was out of the ring for three years. When he came back he had to take a easy fight just to get over the ring rust. Conor McGregor has been out of the cage for two years. He's not taking no easy fight to shake off his cage rust, he's going straight in with Khabib. Respect to Conor, if he loses then it's cause of cage rust.