am i tripping?

how come Jin Woo doesn’t leave any shadow soldiers on earth? I get Beru is weakened because of travelling through dimensional gaps, but couldn’t he have just left a couple soldiers on earth before leaving? He has millions afterall and even just leaving a regular soldier is like dropping a hydrogen bomb in the world. Is it because of the proximity or how far JinWoo is from earth? His high orcs still were able to exist despite Jin Woo being in a gate. A average soldier probably just no diffs the entire verse so I was curious why no shadow was left assigned to Cha or Sung Suho before he left like he did for his sister. maybe its the distance, but idk his shadow monarch capabilities are so insane so I feel like distance from a shadow shouldnt matter to him atp