Engine losses due to bird strike are pretty common. Planes declare an emergency and are vectored to a holding pattern where they run though emergency checklists and verify that they are ok to land at the current airport with current capabilities, weight, weather, etc. This takes 10 to 20 minutes.

This did not happen on this flight

According to the timeline I saw they were cleared before declaring an emergency. This means at the time of emergency the standard checklist required their gear had been locked and flaps set. Either they were not operating within regulation before they declared emergency, or they raised gear and retracted flaps below 900 AGL and decided to make an impossible turn instead of stabilizing their flight.

I don't know what happened in this event, but the concrete box is painfully uninteresting compared to basically anything that happened before it.