One reason to recover the hull is that the pax may have recorded their experience of the flight, in forms that can still be read.
That is a fair point that hadn't occurred to me. Given the proliferation of devices nowadays, and the relative integrity of solid state, it may just assist enormously.
Back in 1979 during the ANZ DC-10 CFIT the team recovered a film camera that had an exposure taking by a passenger (after all this was a sightseeing trip) at the exact hundredths of a second before impact, showing snow scattered by the impact of the hull. The passenger passed from life to death in that split period.
Point here is loosely that the intelligence picked up from the tourists film cameras was invaluable assisting in tracking the final moments.