Could be useful if a tidal wave comes when you’re on the beach… If it’s taller than the wave and doesn’t collapse from it…
Although tidal waves are probably quite unlikely on that coast… So it is probably just a sculpture.
Edit: or maybe not:
During heavy storms wave heights of over 5m can occur
Bottom circled one appears to be doing the Nazi salute, it’s just kinda pushed down and hidden a bit by the Nazi behind him…