Anyone who thinks otherwise should do a braking test with "recommended" pressures
and then with sidewall maximum pressure. Or ask around on a track where lives depend
on 1 PSI.
When riding on the track one's only concern is traction, therefore you lower the pressure. You are not concerned with mileage or temperature or ride of the tire.
Do what you want because everyone has their own opinion and it doesn't seem to matter what facts are put out there. Done and out. All ride safe.