I highly doubt the average man on the street scores a fight round by round correctly.

I don't watch Olympic diving on a regular basis.
I'd probably end up scoring the diver who was doing the crazier crowd appealing flips and rolls in the air higher than a diver who did things right.
I probably wouldn't catch the technical errors as well as a diving purist would.

Any unbiased FAN of boxing knows Floyd won the fight.