In all the documented incidents so far there has never been an issue with the Inertial Attitude displayed on the primary flight displays or on the separate standby. A simple cross check of all 3 would confirm the same.
Airspeed issues and associated overspeed or underspeed ( or indeed both ) warnings were what happened requiring the crew to look "through" their displays and revert to "basic flying skills"
Oh, and no modern western built transport has an AOA indicator fitted.
Who knows what this crew were thinking, who knows how fatigued they were on the night? Who knows how much Turbulence they were dealing with?
All things being equal they "should" have been able to deal with the situation, obviously all things weren't equal.
