It's difficult to attribute fatalities to storms in general (think of a swimmer swept out to sea by rips generated from a storm 1000 miles away), let alone with a storm like Maria. So many of these deaths are indirect, but attributed to the storm. The easy ones are due to falling/flying objects or flooding, but the hard ones are due to power loss and lack of resources following the storm.
I could believe a number like 65 due to landfall itself, but no way did it end there. And that's pretty important for the NWS, because the after action reports will want to focus on why fatalities occurred. Was it a forecast problem, communication problem, etc?