Because proles are proles and you may be racist enough to think your western lives are worth more but when it comes right down to it, to the bourgeoisie who rule the west consider all proletariat as expendable by their nature for profit or in this case for offense and defense of their empires.
They’re really coming for him over this. Also please see things like this as a great example of divisions within the bourgeois. Musk is more international finance leaning whereas the thought in the US is controlled by the industrial aka military/defense/intelligence types.