prejudging is the show, no doubt...
but its boring to 75% or more of the fans and general people (competitors fams, etc).
its like the "nerd" part of the show. thats why the night show is at night, its the pageantry type part. its more interesting to the general masses.
its not ****in rocket science. shows wont make the same money if the shit is reversed. its the same reason theres a bikini class in bodybuilding. It puts asses in the seats and therefor money towards the show.
like Rich posted a single show would rock in most cases. Some shows do not need to be seperated into two halves, they arent big enough, but youll be hard pressed to see a lot of promoters simplify. they wont make the same money in most cases.