Yes I agree. Stafford needs to adjust his thinking or that weakness will bite us in big games. The NFL is a wolfpack: a vicious, opportunistic, unforgiving, monster.
My opinion is that Stafford is still in the mental adjustment period. Remember, he spent 50 years in the garbage disposal grind of Detroit. It does take some time to fully change. I've lived overseas in a non-Western country for an extended time and it took me at least a year to get mostly adjusted culturally and there were still periods of frustration, anger, and learning.
OTOH, let's not forget that Stafford brought us back to victory in three playoff games. That ain't luck, there is some skill, intelligence, and talent at play there.
We all know that Einstein was a genius, but his brother Frank was a real monster.