The hurricane may only be a storm once in reaches New England but that does not diminish the chance of power being down, fallen trees, debris flying around at 60 or 70 mph, tap water being unfit for use and flooding due to heavy rain and already saturated ground. In NYC the power will be shut down in some areas even though the wires are underground, flooding may be a problem, so if you live on the 20 th floor of a building, no elevator, not bad going down but walking back up is a *****.
From personal experience when Wilma hit Palm Beach County, power out for nearly a week, no traffic lights operating and debris all over the roadways. No cell phones for quite a few days and no land phone for about 3-4 weeks. No gas for our cars as most gas stations did not have generators to operate the pumps, atm's were out for a while too. Food to buy was scarce and no bottled water to be found.
Given all the information that's out there only a fool wouldn't be prepared. And if not prepared and some hardship does happen, don't whine about it, you had warning. If by chance one comes out unscathed, just consider yourself fortunate. We take them serious here in Florida and the gulf states.