I chose to ignore that, if you manage to clear a vitamelange planet from biters through extinction you'll likely have automated meteor defenses on there too to prevent nests dropping inside your base.
Meteors can still land anywhere else on the planet's surface and "should" still pose a threat, but the amount of chunks having to be generated for that by pollution outweighed it, so this mod deliberately voids pollution even when there are still asteroids.
Glad someone cared enough about this mod to post tho, but i currently do not plan to exclude vitamelange planets since it goes against performance gain. 🙂