That was the explanation given by buckknives then....buckmaster... I remember there was talk about Buck blade failure tied to poor heat treat going around back then. I do wonder if that is connected with this blade breakage.
But if i were to make an educated guess,
The tip tapered to a very fine and slim profile.
And one couldn't possibly expect such a thin point structure
To take on the weight of the entire knife (and it really was heavy)
along with any excess force applied to its less than flexible tip.
With its already inherent design faults
Its a big yes that faulty heat treatment would have given more cause
For the sad result of an otherwise awesome behemoth.