So the weird uncles might ask: well, then, why bother?
Tribalism excluded, I see only one remaining reason to either talk about secession, or actually carry it out: the tantalizing project of creating a new sovereign structure from a clean-room design in the 21st century. When implemented on existing populated territory (rather than via dynamic geography), this can be described as a reboot.
If one favors the secession of California, it is not because one feels the Schwarzenegger administration has done such a great job that it should be promoted to full sovereign stature, like the PLO. It is because one feels that the way California is being governed is entirely wrong. It is completely and utterly misguided. The political institutions of California are not in any way susceptible to repair. Rather, they require complete replacement.