Luo'er always had a wish within him, and that was to keep Lipei's casualties at the lowest possible, ideally with no casualties at all.
If he wanted to achieve this effect, unquestionably, resolving it through peace negotiation was the optimal choice. But currently, such circumstances are not viable, so he is constantly troubled, pondering over what method could be used to minimize casualties to the greatest extent.
The method of Jie Yingzhai and fighting stupid battles might be lacking in consideration, but it was the least casualty-prone plan Luo'er could think of.
Modern warfare, in essence, is a contest of attrition. This is true for Earth armies, and it is equally true for the Otherworld armies that have entered modernization.
Is it appropriate to exchange ten thousand artillery shells or a million bullets for one human life?
Such questions seem needless to Luo'er because, to him, it's exceedingly appropriate.
