I mean surely the requirement to see certain shades of blue and green mingled together shouldn't be the be all and end all? It's not like I'll be flying a jet or anything, ffs.
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Being able to discern certain colors is pretty important. Regardless of the country you live in. The idea isn't that you PROBABLY would never be in a war, its that you COULD be in one. They have to be selective about that kind of thing.