Which would overheat and be undriveable when it starts/finishes in the dry, that also throws the whole PI system and wheel choice in there out the window. Not sure why you are trying to argue any of it is realistic when it's clearly just designed to add variety without the full realism the same as everything else e.g. car catergories.Except race cars dont use slicks in the rain in FM7. Drive any open wheel car in the wet and you can clearly see intermediate tyres are fitted automatically.
Like I said it's the best game but the worst representation of actual motorsport.