The world literally revolves around her
A lot of the amusement and consternation around the behavior of the Karen is how they literally expect everyone to change to fit their needs and their schedule. Do you own a store that closes at 5.30 pm? Karen will expect you to stay open until at least 5.45 pm because she was stuck in traffic getting back from her hair appointment.
It seems that this sense of entitlement extends to heavenly bodies as well as nail bars, as you can see in this screenshotted post. This Karen has literally asked a museum to reschedule the solar eclipse because it clashes with her kids being in school. Amusingly, she was called out pretty quickly.