Ultimately, the oddsmakers have the right idea on this one.
KSI has done well for himself within his world. As far as influencer boxers go, he has more natural gifts than most and it's clear that he has worked a bit on his craft. He doesn't look like a pro, but he is comfortable exchanging.
But Fury has the capability to look like a pro at time. He's never going to be a legitimate contender for a title, but he has just enough name recognition and skill to continue to get, and win, these types of matchups.