Bruno
In this way you can try the really consumption of tires with a specific fuel load and also an approximate time of the laps with that specific fuel+tires
Practice tests are made with minimum fuel and the degradation that appears on the screen is the estimated degradation of the first lap of the stint, ie regardless of the amount of fuel, degradation wouldn't change, this would only be useful in the case of the lap times.
However, I think implementing this would be very dangerous, since everyone could figure out the exact race pace with each tire and with each number of laps, creating a strategy would have no greater complication than picking up a calculator and pressing keys. There would be no human factor in strategy creation. And although I use the calculator a lot, I would not like to end up becoming a robot.