Your forgetting that I do not know my exact happy zones (owing to having a new TD) so haven't hit the perfect set-up, and that stamina points are worth more than conc points (and that I have a higher level car, but we'll brush that one aside

)
I am willing to concede that aggression may not be as bad for your car wear as we once thought, but you only need to look at the most succesful drivers on the market to see that they have no aggression. Drivers with aggression invariably do a lot worse than their stats would otherwise suggest.
The conclusion is simply that aggression makes your driver slower. This may not be so in quali, based on the fact that I have never been a particularly fast qualifier in this game.
Exhibit A Exhibit B
and the clincher.....he's an alright driver but compare the next driver's career record with those above and then compare other stats...
Exhibit C
The evidence on this is overwhelming.
Aggressive drivers get worse results