I'm not up for a big debate about this tonight, and you're entitled to your opinions whether you're simply stating your thoughts or trying to stimulate a response. What I can say is this horrific incident could have been triggered by a number of things, like you said, design flaw, maintenance error, numerous weather scenarios...maybe something else, bird strike, lightning, contaminated fuel, crew illness or state of mind...
We don't know and we shouldn't be apportioning blame until we do know.
Your point about corporate greed is a pertinent one, and one I've touched on myself a few pages ago with Kow, the clear conflict of profit versus safety. It just doesn't work.
Thoughts with all those involved in, or affected by this incident.