Understood.. However if salvage was not possible I think Germany had to put more effort in finding friendly dialog with Argentina, despite the pressure from Brintain.
Sell ship to Argentina was a sane option too.
But captain himself was too soft, he felt guilty about crew lifes, disinformation of heavy naval British forces waiting outside the esentuary did an impression of escape impossible too.
At the end if I was a captain I would engage in battle anyway. Rather then shoot myself in the head