Why Pucará torpedo attacks would fail

How would the Falklands War change if Argentina armed Pucarás with torpedoes?

It would probably not help Argentina; the slow and obvious attack profile would make the aircraft exceptionally vulnerable.

The answer questions whether Argentina had suitable air-dropped torpedoes in its inventory. Most contemporary aerial torpedoes served anti-submarine warfare, so an attack on surface ships would require older weapons and a different release technique. Crews would need training in that unfamiliar attack profile, which would make their intentions obvious to the defending ships. The Pucará's limited speed and conspicuous approach would leave little margin for escaping British air defences. The objection concerns the aircraft, weapon, and attack method, with no suggestion that Argentine pilots lacked courage or skill.