To me it sounded like you said that everything will be ok once you get to SR S. Sorry if I misunderstood. I replied because at SR 99 (only DR C) and most of the people I encounter have terrible race craft. All my opponents are at SR S and are fast on a q lap but can't do a clean pass. It's not like they position their car to make a move, they just drive through you like you're not there. The worse that can happen is a 3 second penalty that they will serve at the line and doesn't have a penalizing effect. You can win a race this way and still increase in DR and keeping SR still in the S rating. A good penalty system encourages clean driving, the current penalty system rewards bad behavior.
That's exactly how it happens to me in DR B. Many drivers have very fast qualifying times but driving lousy races. That's why I was involved in the discussion when it came to golden laps. These drivers can drive a fast lap anyway. But in the race, they drive as if they were alone. Even if someone is ahead of them and the tires are worn out they brake in the same places as in the qualification. When overtaking, the lines are not varied. It is simply stabbed inside. I could cite such examples here dozens of times but you certainly understand what I mean. The game requires cautious driving in the two videos, but then plays quite differently. Dirty tricks and reckless driving are barely registered or punished. Even in the driving tests this is hardly taught. Basically, there should be a kind of driving school for the clean and prudent drive. Only when you have successfully completed everything there should be allowed online. Online, the rules should then be monitored also. It does not have to be punished at all. Maybe hints about minor mistakes (for example, if you do not give enough space to other drivers) are enough at the end of the race or from a virtual spotter in der race. GT Sport is played by many players who have little knowledge of racing and consequently have little understanding. Therefore, a little more coaching from the game might not be bad.