Geologically speaking, sure. But humans don't live in geological timescales: it seems possible that, if humans could somehow explore other star systems on a re

Geologically speaking, sure. But humans don't live in geological timescales: it seems possible that, if humans could somehow explore other star systems on a regular basis, they might come across some systems where there was a relatively recent collision leaving lots of close-together asteroids that haven't yet had enough time to condense into a new body.