I'll ignore the rest of what you said because it is just silly, but what is wrong with the tyre model?
Personally I think that they reach core temperature too fast and its too easy to overheat them. But then I am happy to keep it this way because most races are only a few laps anyway and it adds another element to the driving. Perhaps they just need to couple that with the wear rate option.
But other than that (which many PC 'sims' dont even yet model), how is the tyre model stone age?
You think PC sims don't even simulate tyre temps?
Wow...
But anyway, GT6;
Tyre grades are nothing more than grip multipliers. A honda fit gets the same G force as a Jaguar XKR-S.
Temperature is poorly simulated, you go from normal to max temp back to normal in the space of a few seconds (i.e 1 or 2) which means it's just a canned effect.
Lack of torque steer. (canned FFB effects and road cambers =/= torque steer)
No sidewall flex.
Virtually no progression from grip to slip.
And that isn't even all of it.
On another note, if i were to propose the following test, what do you think would happen in the real world (and other simulators).
Park a high powered rear drive car half on the road, half off it. Floor it to get sustained wheel spin. What would happen?