There are certainly more important things to write to MPs about - but it doesn't follow that we shouldn't have written about this one. (Obviously, given the age of the thread, we need to be thinking in the past tense here.) There was a chance that my local MP could affect the legislation on licencing, but I seriously doubt if there was ever a chance he could influence whether we went to war or not. Again, he can affect laws going through the house but has precious little opportunity to introduce new laws. So there is no very easy link between what is important and what is worth writing to your MP about.