To me, it's interesting in the "Huh, neat" kind of way in the same way knowing the etymology of "sour grapes" is. At least personally, I don't find it particula

To me, it's interesting in the "Huh, neat" kind of way in the same way knowing the etymology of "sour grapes" is. At least personally, I don't find it particularly useful for actually learning the language - there's just too many words like this for it to provide me any real advantage, and I'd likely end up confusing myself more when running into the words where there isn't any similar significance. For example, irresponsible/sloppy is 'いい加減', and 加 means increase while 減 means decrease - I could see myself going 'hmm I know the word contradiction is one where the two kanji actually contradict each other... increase and decrease contradict each other, I bet this is it!"