Democracy as Defense
[N]ot only does every democratic election establish Taiwan as an independent state, but the deeper democracy entrenches, the thornier the problem it presents for the occupation planning.
Asiapundit concurs and adds:
Taiwan's rambunctious democracy makes it unlikely that the island could be easily forced back into an authoritarian system. Plus, it strengthens the resolve of allies to come to its defense.
Update: Jujuflop and Peking Duck weigh in as well.