It absolutely did. A violently broken arm with a stick can result in an open wound where the sharp end of the broken bone sticks out (an open fracture). This, happening in a rainforest with no doctors around, is a recipe for a deadly infection. We don't think about limb fractures per se as being too serious, but this is only true in the context of developed countries of the last 100 years or so.
Fusiwe absolutely could have caused a mortal injury to her, even though it wouldn't have been immediately fatal.
Fusiwe absolutely could have caused a mortal injury to her, even though it wouldn't have been immediately fatal.