I will let Messrs Bove and Daley explain the design reasons but from my perspective, Mr Karl-Friedrich Scheufele and I shared one driving ambition for the LUC 1963 Chronograph HW PuristS Edition: it has to be "a pure distillation of the function and form of a chronograph that could survive the vagaries of time and fashion".
Apart from the Chopard LUC convention for hands' metal colour matching to the case metal colour, I believe that extraneous material like Superluminova, however well applied, would fade or worst - flake off with the passage of time. The hands have to look as good three generations later.
Most of us have access to a light source especially when timing short epochs of time viz horse racing, car parking or even pasta cooking. Almost none of us are SAS members infiltrating enemy camps in the dead of night thus dependent on an autonomous glow to read the time.
Regards,
MTF