@BulletproofXX86 time trial in the wet is just as important as the dry TT. you create a setup and go straight onto the track, can go straight back into the pits, change something and go straight back onto the track.
In the GP/lobby you have a limited number of tires, too many variables, other cars on the track and a limited time, depending on the mode you also have to drive back to the pits every time and wait for the animations to finish to be able to change something on the setup.
Nothing can replace the wet TT mode, it was always very important for those who wanted to practice in the rain