You have some dirt next to a pool that has an extra drop of water in it because you need them to be equal. If there's too much dirt outside the pool and not enough water inside, it's gonna look weird. We can't have that.
You spend a few hours making sure the water-to-dirt ratio is perfectly equal, not for yourself, but because the King (きん) of England told you to. You may agree that equality is important, but it's the King's responsibility to keep things that way. Which is why he ordered you, small peon, to do the equalizing work for him.
Currently there are no similar looking kanji which exist in the WaniKani learning system