This is all endless speculation.
The crew+a/c hit mostly a snow lined concrete wall and the impact was unsurvivable.
Period.
I also saw the interview, widely diffused on russian TV
(go question the wisdom and credibility instinctively!).
I challenge anyone to bang their head against the remains of disintegrating (car/aircraft/boat/) without a helmet, decellerating from 90mph+, & remember anything worth anything.
They did roughly the same thing for the (ONE) survivor of the Jaroslavl Yak42 accident.
I think this kind of media intervention is blatent disrespect for the deceased.