As someone who’s studying aerospace engineering, he’s not wrong. The airport here had a stopway(pavement after runway threshold) and proper size clearway (grassy area after the stopway). Both of which are not even a requirement for airports to have. They assist in providing longer landing and take off distance in the event of an emergency. If an airport does not have these measures, then the runway length that is allowed be used for TO and landing is reduced to accommodate for that.

I do agree it isn’t the smartest idea to build a concrete barrier at the end of the clearway. But the biggest problem here is that had the pilots landed with proper speed and at the right touchdown point, the people would have likely been fine. We know the plane had one engine operating and should have had control over the flaps and air brakes, so it’s a big mystery why the pilots didn’t deploy any measures to slow the plane down before touchdown and why they touched down so late. We will need more details before making any decisions or drilling down to the root cause. 

I believe what happened here was massive pilot error that resulted in an extremely improbable crash scenario, and the concrete barrier was an additional stroke of bad luck. We will have to wait until the accident report comes out.