I assumed they had hit the underwater jetty (dashed lines on the chart) to the north east. The photo makes it feel like the other side of the inlet.
Outside of the submerged jetty which appears to be well noted on the chart, are currents the hazard most to be aware of? Meaning can they take boats outside of the channel? The channel looks quite wide and the outer markers seem to give a boat a safe course to follow.
From what I've read, seas, breaking seas, are the biggest complaint once inside the channel in adverse conditions.
It seems unlikely the boat simply came in between the markers along the north side of inlet and hit the submerged jetty.
We'll likely never know what happened exactly.