Trail braking is not used in every corner. There are turns, especially very fast ones, where the driver wants to be squeezing back on the throttle about the time they are turning into the corner, since this helps the car's balance and the overall grip level. As a general rule, the slower and tighter the turn, the more the driver will use trail braking to help rotate the car; the faster and more sweeping the turn, the less the driver will use trail braking.