EkwhistleBlower,
There but for the grace of God go you or I.
A professional crew that makes a fundamental error = contributing factors.
None of us are immune fom error.
And by the way, the error in your post is that at 360 tonnes the flex off Rwy 16 in Mel is 45 - not in the 30's.
So much for your awareness - now I'm concerned for you!