It's just too sad that Twilight learns that one has to find her destiny by herself, rather than live with one forced upon her, but then gets forced to receive her 'Destiny' from Celestia without consent or request.
It's also pretty depressing that this was done to advance the princess motif that Hasbro and Disney are propagating, they think that Girls want to have princesses as role models, not realistic intellectuals, as proven by What Meghan McCarthy said:
[link]It's a sad state if affairs when Race/Job of the characters is at the mercy of toy sales.