The Process of Decision Making in Chess Volume 2: Practice positions and solutions. Position 8.3

Solve for black:

Diagram 8.3- this position which arises from the Maroczy bind in the Sicilian opening, is open only on the dark squares. The main light square diagonals are closed or useless.
Therefore from this observation we can continue to another one: the light square bishops in this position are bad.

Challenge: in this case where both sides “suffer” from the closed light square diagonals, can we say that one of black’s goals is to open a light square diagonal for his c6 bishop?