I use to be a huge proponent of comp.
Now I just don't care. As a competitive and a casual player it doesn't matter to me. If I decide to go to a competitive event usually it is because I have friends that are going. So once I know I'm going to an event I look at there rules, I then pick what award I am going to shoot for and gear my army that way.
I would never not go to an event because of the way there event was setup, that seems, well just plain silly. Back in my hay day of being all about competitive events, GW ran a GT with your main list and two side bar's list, I remember the all of the player's bitching about this format and a bunch saying they were not going to go because of it. You know what the event filled up and I played in it and had a blast.
The only reason I would not go an event because I don't know anyone there.
What it all basically sum's up to is play to the event.
-Jeff
*The last official comp event by GW was years ago and some people may have never played in one, if you haven't I would offer this as advice, give it a try you might like it.