would = 即将 [ 翻译成 "有意" 更恰当, 形同 "天命主宰" ]
  have = 促成  [例: Have him call me = 让他打电话给我 ]; [让,逼,提醒... 怎么都行]
         it = 事

所有不能控制的,都必须用 would 形容，

可能是个固定说法，as sth would have it? 当成词串记下来吧，下次再见知道是啥意思就好

感觉有些拟人化的意味吧，英语中很多都这样的，如a sign says....