He spelled it out earlier, he needs Kido out of the picture so he continue the stories, but he also needs his doll power to cure Hina. So on paper his plan is perfectly rational, though obviously overpowering a grown man to steal his doll isn't likely to work.
@bobbyboi
Where do you stand concerning the RAWs now? I can only find 71-72 here : https://newmangaraw.com/ts/3576/chapter-71/ but do you know a place where more are available?
Saw some RAWs going up to 70. Shit gets pretty real there already.
Do you intend to translate those too in the following weeks or are you waiting for the physical release of next volume?