My opinion has changed as of EP012. I think DoJun should make it so that entire family can have part in the management…
They didn't earn it which is the point of the story. The fact they are more interested in filling their pockets and using schemes instead of finding ways to grow the company tells you everything you need to know as to why it's a bad idea. It's not because they are family that they deserve it. However, in the novel, he did allow the aunt to keep her managerial position because she was good at it