I think the effect of the moon is not so much "catching" things as it is perturbing orbits near earth such that things either crash into earth or moon or get flung away.
Without the moon we might have a lot more stuff in solar orbits that overlap earths orbit.
I expect this could be explained better (and I may well be totally wrong).
Without the moon we might have a lot more stuff in solar orbits that overlap earths orbit.
I expect this could be explained better (and I may well be totally wrong).