https://www.sciencenews.org/article/space-rock-collision-may-explain-how-exoplanet-was-born
WE KNOW, we know collisions and other events shape things
WE ONLY CARE IF IT EFFECTS US, LIKE a tidbit of info on our own planet. as far as some far flung asteroid belt or rock in some other solar system: which collision might have occurred matters nothing.
ALSO: discovering "might have" isn't a discovery - it's a "might have", which is only a pop theory unproven of something science isn't concerned over