To actually answer your question its perfectly clear in a lot of cases that it is slop and theres some simply reasons why slop can win.
1. Generating ai slop is clearly less intensive than producing a real photograph, painting, drawing, etc.
2. Judges for competitions see a lot of stuff - tend to do it quickly - and theres a lot of randomness to who wins. I also just think that judges are often fairly terrible - maybe the incentives just dont exist for getting good judges, especially for competitions (unlike the Nikon one of course) which are smaller e.g. design a poster for our country fair.
So its easy to see that 1. means that the ratio of slop to real can be very high and by 2. the judging process is typically partly random and pretty fallible, so its easy to see how slop can win.
On the judge point, slop appeals to the average and the average is very approachable - so its often the case that people actually prefer ai art to work that is produced from out of an individuals unique experience and vision, which takes more effort to engage with.
Maybe. More likely, it's not all slop.
Its pretty clear that in many cases it doesnt need to be better than slop
So I think by and large it is
And yet this slop won the competition. So perhaps it's not all slop?
Like ive explained winning a competition and being slop are totally sympatico
Edit: I do think its an inditement of the competition when it happens though -- a better organised competition is going to deliver less slop (ai or human)