The NAM should not be ignored when looking at tropical systems. Would I rely on it to make a prediction on where Irma is going to wind up? No. But it's a useful tool for looking at h5 in the short term. Where is the position of the ULL? Is it digging? How fast is it pulling out? How strong is the ridging?
People have been posting the HMON for a week now. It's uncoupled. So why are they looking at it? Well it a hurricane model, but more importantly they are looking for consensus.
The best mets look at every piece of the puzzle to come up with forecasts and predictions. No one should be tossing anything of use unless they get a model diagnostic discussion from NWS telling them there were issues with a model run.
People (myself included) look at the Euro, GFS, HWRF, etc because they are your workhorses, but we need to look at everything to get a better picture. If not, what's the point? Lets just shut down the site, stop giving out met degrees, and show a blend of the Euro/GFS for every storm.