You don't have to approve of what the government does with the army to think that someone can have made the right decision to join. It sounds like you'll gain a lot of personal benefits from it, and if your politics/ethics are OK with you joining, then that's your business. My friends run the full spectrum from in the services to pacifist activists, so we tend to be fairly relaxed about personal judgement - it's people who are surrounded by people who think exactly the same as them who get judgemental (on either side).