A viewer raises the theory that Britain deliberately chose the less prestigious General Belgrano over the Argentine carrier. The accounts cited in the answer point instead to geometry and contact. The carrier had turned back and moved farther away before a British submarine obtained a comparable firing opportunity. Belgrano remained the available target, so the choice need not be explained as a political preference for sinking a cruiser.
Notable Point · 3:00:50-3:01:13
Why the Argentine carrier was not attacked instead of Belgrano
The targeting explanation is tactical rather than symbolic: the carrier had turned away and no longer offered as good a submarine shot.