Difference in the real world series the racing orgs make it very clear to each driver at each circuit where the boundaries are located on questionable corners and what the penalty will be in advance for exceeding those boundaries in the releases to the teams and in the drivers meeting.
In game that same information concerning such rules is not as forthcoming, its not even available as far as I am aware of.
Except that isn’t true at all, drivers constantly push boundaries and action is usually only taken when a clear and large advantage has been gained.
This happens in F1 too, the ‘pinical’ of racing