If a leader has a gun it's easy to wound people. When you have a gun and a lot of responsibility it's easy to get carried away and mess up, wounding the people you were supposed to be protecting. You can even wound yourself.
Which leader wounded the Japanese people? The Shougun (しょう). The Shougun is a military leader. The Shougun even has gun in the name. And they wounded hundreds of thousands of samurai and soldiers.
Currently there are no similar looking kanji which exist in the WaniKani learning system