I would prefer if any group of of people could exit from a parent government, without any preexisting precedent of autonomy.
Maybe the right level of governance is the one people choose from themselves instead of the one into which they were born.
Maybe the right level of governance is the one people choose from themselves instead of the one into which they were born.
I may be being overly facile, but "I consent to the government that I choose" sounds almost exactly like "I do not consent to being governed" to me. (Perhaps you mean that one gets to make such a choice once, rather than at will and repeatedly; but then when should such a choice be made?)