I think it's pretty obvious, but there you go.
Also, mind the hypocrisy; you weren't exactly "respectful" yourself.
It's only what you wanted to hear.
Here's more info. Most racing games use 2-dimensional "multi-samplers", GT included.
In those two cases, the dirtiness is due to instabilities at part-throttle (they weren't recorded on a dyno) causing uneven fueling and secondary combustion in the exhaust: spits, pops and farts. Such things make looping very difficult (like with the
Tuscan).
You don't get to be a recording engineer without knowing about clipping; it's very basic stuff.
I guess they just can't win.