Board Thread:Theories and Speculation/@comment-45444155-20200410191621/@comment-4912646-20200412133010

ReweR 1331 wrote: Yeah, it's true.

But still, from your conclusion / assumption, it turns out that any mediocre shinobi who can't balance (50:50) energy is a Yin Release or Yang Release user. I don't think it was ever stated anywhere that balancing the two energies is hard. According to Ebisu, the real hard part is creating just the right amount of chakra you need and then converting it into a technique, since any extra chakra is "wasted" (which doesn't really make sense either, honestly).

Another oddity is that Shikamaru treats Yin Release chakra like it's special and only used for rare techniques like his, but apparently it's part of every common genjutsu. This is probably just an example of Kishimoto not thinking things out in advance though, since he didn't actually mention the term "Yin Release" until years after the Tayuya fight.