When Cadance seeks excitement, she doesn't bring it to her empire; she LEAVES her empire to seek it out elsewhere, putting the thing she finds mundane out of harm's way.





When Celestia seeks excitement, she brings it TO the thing she finds mundane and forces it to become more exciting against her people's will.







This, I believe, is the reason for this comic's existence, and why people give Celestia a hard time while leaving Cadance alone.





Keep in mind when she did this too; not long before this gala, Discord had been helping Tirek steal the magic of everypony in Equestria. Yes, he learned his lesson, and yes, Celestia and the Mane Six forgave him for that, but I dunno how ready everypony else was to see him again in such a spotlight...