Ooops, you're damn right ! I don't know why I was persuaded that the "lifeless" tag was included in the "undead" tag
Anyway, thank you so much Edi ; I was blind, but now I see !
What's more, I understand now that the "inanimate" tag that I see on the mod inspector is just another word for the "lifeless" tag that appears ingame. Double facepalm !
Things were just a lot more simple than I wanted to see them...