Japan can't go to war though, that's unconstitutional ;)
But actually to answer the question: it's a weeding-out process. Only the people who genuinely in their heart of hearts feel that they belong will persist. And those people will act in the nation's interest because they feel part of the nation, even if the process of being recognised as such is a bit demeaning. Just look at how OP rationalised his abuse by bureaucracy...
What's not seen is how many people gave up which would have made perfectly fine citizens. That's IMO the real problem with this approach.