You may be right, if you believe that the mortar holding the brick is stronger than that chuck of concrete.
But I also think you would see more cracking in the joint between the concrete and the brick along the wall.
Do you know how much water is absorbed by brick and drains out of the weep holes.
All I know is you look at all possible causes before you decide what and how to fix things, expansion cracks show up in bricks not foundations
So the site where you found that photo should tell you how to fix that.