Well. This is quite a delicious interpretation of Yukari.
Despite all her power, her friends mighty and noble who all take her wishes with implicit acceptance - in the end, she just can't win against Reimu/her own feelings.
Concept of earring and wounds applied to those long-lived yokai. Ear's wound can be parallel to human's error. In page 17 Yukari indirectly said to Reimu that human's time are limited and shouldn't be wasted for waiting (to heal from it).