No, those 907 people absolutely had to die so that Britain could keep its frozen rock halfway around the world.
It’s only legitimate out of context. The two countries were trying to negotiate a transfer before the war broke out. Argentina was ruled by a military Junta and used the invasion to bolster its internal politics. Thatcher did the same thing by using overwhelming force over a territory that Britain was trying to get rid of. An Argentine cruiser was sunk outside of the exclusion zone.
https://en.wikipedia.org/wiki/Sinking_of_ARA_General_Belgrano
Afterwards Britain fortified the island to feed its military industrial complex and drum up more support for its decaying empire. Everything about this war was totally pointless except from a domestic political standpoint.
The victims of this conflict are the casualties of a completely pointless war, on either side. Neither side fought for legitimate reasons and both used it to drum up nationalism.
What I find interesting about this is that everybody knew exactly what would happen, and then it happened. It’s a perfect counterexample to the logic of “this system isn’t perfect, but it’s the best thing we have.” It’s just the rich and powerful using leveraging their wealth and power to become even more so, and under the current rules nobody can stop them.