I was gonna stay out of this...but I feel that this is like saying the gaping hole in your roof doesn't matter at all and isn't really broken because its the dry season. If we have the ability to perform preventative maintenance, why not do it? A problem is defined by what is actually broken, not what gets commonly abused. If I know about a bug and I'm the only one that knows about it and I use it often yet never report it and never get caught and nobody else knows about it or uses it, is it wrong? Should it be fixed? Absolutely. This is why we need testers. It is their job to find the possible points of abuse so that the devs can make a stable and fair game and also so that the moderation staff don't have as much to do. Otherwise we would have to keep a book on all the abuse-able bugs in play and watch out for all of them. It is the job of the moderators to keep the gameplay fair. However, the devs also have a responsibility to make exploits less possible. Lets not take away from that. Over-moderation never ends well and is not a good solution. And with those who would abuse bugs, it causes drama. Fixing the original hole prevents all that jazz.
Also, this is pretty far from the original topic....