John- in this case, and in many accident cases, it's quite apparent what caused the accident shortly after.
If you believe in speculation, assumption, and guesswork in absence of fact, yes, you might see it that way.
That's not how mishap investigation works, however, nor is it a professional approach to the situation. A number of possibilities exist at this stage, none of which should be discounted.
Would you agree that a massive aft load shift is quite obvious at this point? The details of how that happened need to be filled for the first links in the chain, and that will be critical in preventing future occurrences.
I would not, because there's no reason to make such an assumption presently. It's one possibility, and it may be part of the cause. Then again, it may not have happened at all, and the investigation may point to other causes. We shall see.