Mastering other weapons: play other jobs.

People argue with you because of three reasons:
1. It would only be used to make WAR proc everything
2. Apart from that, it's not needed. None of those WS are even useful for WAR, even if they did use those weapons for whatever reason
3. Your relentless reasoning: "We already have so much, so it only makes sense to let us have more!"

Those are things that won't change, people who dislike these things now will always dislike them, so please stop trying to convince everyone.