Versteckte Krater verraten, dass die Erde einst einen Ring gehabt haben könnte – wie der Saturn

Seems at first impression that asteroids could be captured into polar orbits as well, if less often notwithstanding. Article appears to imply that equatorial alignment is a necessary element in ring formation scenarios.

I could see the temporariness inherent, but aren’t Saturn’s also?

What am am I missing here?