What you've gotta remember is that as "easy" as it is to hold a contest, it's not just over when you finish your ride/park and submit it. The mod holding the contest then has to go through whatever he recieves and judge it, before marking it subjectively and giving out results, and of course before this, the rules have to be created and posted, and constantly checked to ensure that no new questions have been asked by people who want to know things about the contest etc.
Basically, its not easy holding a contest at all, so stop complaining about it. Let the admin make their own decision about it, if they feel its worth it, tey'll do it.