I would actually argue that they are better at sniffing out a real threat in the long ranges when your realistic window is much larger than when you're trying to pin it down to hours.
It's the near term when a 20 mile shift can really wreck a forecast that the higher resolution guidance is showing big differences. That's why when all else fails you need to work from the top down. A model is way less likely to whiff on a jet streak, than a vort max, than the 850 front, etc.