I'll use the soldier example.

The Allies were "suffering" to achieve a goal when fighting the Germans.
-but-
The Germans were also "suffering" to achieve a goal when fighting the Allies.

A woman in an abusive marriage can "suffer" because she hopes that he will change (she is "suffering" to achieve a goal).

The suffering of a traffic accident (especially a solo one not involving the sudden breaking of the frame in 3 pieces?) .. is never an intentional event. Not even a particularly good example, that. Here a deranged view of 'causality' rears it's ugly head - deranged because it is insoluble in this context - except for lunatics, forensics and lawyer-type punctilious mindsets.
The world is a hazardous place. Sometimes, things happen. They happen to you because you were in the wrong place at the wrong time. Take what precautions you can and realize that you are not immortal nor invincible nor are you guaranteed anything in this life.