• Most people (judges included) overvalue takedowns into guard. While successful takedowns demonstrate the always-nebulous "Octagon control," they don't count for much else by themselves. The fact that Hamill was able to take the fight to the ground six times weighs heavily in the minds of many, probably more so than it should.
• Many have trouble approaching each round as a separate entity. The ten-point must system requires you not to be influenced by what happened in prior rounds. That's easier said than done. When Hamill came out and dominated the beginning of the fight, it surprised and impressed pretty much everyone. It is only natural for that impression to color people's opinions on the fight as a whole.
• The MMA community is susceptible to the echo chamber effect. Public opinion is heavily influenced by the position taken by Joe Rogan and Mike Goldberg during the broadcast and by a select few opinion leaders in the aftermath. Opinions deviating from conventional wisdom are attacked and ridiculed, meaning that most people whose opinion contradicts public sentiment are likely to keep their thoughts to themselves. Without opposition, popular opinion quickly turns into consensus.

FightMetric deals only in numbers, not in opinions. Most of the time one follows the other, but occasionally those two things can produce conflicting conclusions. Before putting stock too heavily in either one, it's valuable to ask, "Are you sure?"