The article usefully highlights a genuine evidence gap in women’s rugby concussion research and describes a new Cardiff study combining mouthguard impact data, cognitive testing, MRI and modelling, with results expected by the end of 2026. However, its stated premise, also highlighted in the subtitle caption, that “female brains are softer and more vulnerable” is not scientifically supported. Current human brain elastography evidence does not show a general tissue-level softness difference in women versus men. Biomechanical modelling work similarly reports that material properties do not depend on sex, although they did vary with age. The main differences between male and female brains simply come down to size (male brains tend to be larger). Female athletes may show different concussion incidence, symptom reporting, recovery profiles and exposure patterns, but systematic reviews attribute this to multifactorial biomechanical, hormonal, social and sport-context factors, not to any established fact that women have “softer brains.”