What statistical issue argues strongly against the capture theory for the four largest moons?

Answer

The probability of capturing four large, regularly orbiting bodies into nearly coplanar orbits is statistically very low.

While smaller, irregular moons may have been captured, the simultaneous capture of four massive, regularly orbiting bodies into stable orbits is highly improbable based on physics and statistics.

What statistical issue argues strongly against the capture theory for the four largest moons?
SpaceOriginJupiterGalilean moonsmoons