He's saying that whether or not they fire this person the day may come when they have to get rid of someone.
More broadly, managers like to hold onto headcount if they can unless someone is a real problem for their team. If they're just someone who isn't an ideal fit any longer they'll probably hold onto them.
More broadly, managers like to hold onto headcount if they can unless someone is a real problem for their team. If they're just someone who isn't an ideal fit any longer they'll probably hold onto them.