[svandamme]

Sounds a bit like they are making rather big assumptions being made by those not there.
I would expect a bit more evidence to make such a conclusion.

For all we know the pilots were very very confused, cognitive problems due to some kind of medical problem or other.. Maybe the darn cockpit was full of smoke from some kind of fire and they didn't have a clue where they were and just did a landing by the book based on altitude and attitude... and just put the gear out not knowing if at all they were over water or land.

lots and lots of possible "what if" scenario's possible so definitively picking is problematic if you ask me..
Convenient perhaps for the airline to scape goat the pilots at this point.