Dunes protect nothing. Three decent sized waves and they're gone.
Dunes work with trees behind them...beach then dunes then a marine forest and then homes built behind trees that block their view. There needs to be a compromise between what we want as a paradise and what nature wants to take back.
Dunes offer protection as they did in Lavallete. In the north end of town, where dunes were the highest (around 9ft or so) there was relatively less damage compared to the southern end of town, where the dunes were significantly smaller and there was devastation. Likewise, Ortley Beach, which had little dune infrastructure is, wiped off the map.
I live in ventnor and have been stuck on the island since last sunday. tuesday morning before all the crazy police state nonsence, we got a chance to drive around the island. The majority of the damage was caused from bay flooding. however the beach side blocks without dunes were also hit hard. Having the dunes can be the difference between staying dry and safe (my block) or having 3 ft of sand blanketing a block like snow (all of longport)