>"Then we shall be ruled by Christian judges or elders? How is that a lack of rulers?"
Sister, you (and many others) are viewing this issue through the lens of hundreds of years of barnacle-like accumulation of tradition, government propaganda, and egregiously corrupted translations of the bible, so I implore you; please to the extent possible do not prejudge what I'm about to say:
The answer is BOTH yes and no. To you, as one who I know to be fluently bilingual, my first observation about language issues should make a great deal of sense. The root word "rule" is an egregiously bad translation from Greek to English. I believe it to be INTENTIONALLY bad because of the corrupting influence of nation-states (which scripture teaches us are under the control of satan, "ruler" of this world [John 16:11, et.al.]). The Greek root most often mistranslated as "rule" is ἄρχων (archon), and its core meaning in Greek is "first." This is where we get the political title "Premier." The biblical idea is far more that of a "leader" than a "ruler," and PARTICULARLY does NOT include the connotation that said "leader" has some inherently legitimate right to compel us by force to do anything.
And so, YES, "we shall be ruled by Christian judges or elders" that WE VOLUNTARILY look to as "leaders," or "first" among us BECAUSE we (individually, NOT as a "collective") have respect for their wisdom and guidance.
And also, NO, because we are NOT obligated to submit to the diktats of whatever thug who HAPPENS to be "in power" at the moment is attempting to compel us to do.
Jesus is King; he is the only one with an authentic RIGHT to "RULE" us (in the English sense of the term), and the absolutely GOOD NEWS is that Jesus is a BENEVOLENT King who truly has our individual and corporate best interests at heart.
Summarizing; the only legitimate human governance structures are 100% voluntary. Jesus/God'/Scripture's long-obscured teaching on that matter is that it is the individual, independent assemblies of believers who are VOLUNTARILY participating and who answer ONLY to King Jesus who should be governing us.
For a more comprehensive discussion of this, please see:
https://peakd.com/politics/@creatr/a-sola-the-reformers-missed-sola-ecclesia