(Please, someone stop me)
But I am not twisting your words, on the contrary, I hit the nail on the head, as proven by your next statement:
First, you need to understand the difference between a corpse and a carcass. A dead human is a corpse. A dead animal is a carcass. Rotten corpses are found in all the battlefields, along the river banks, etc., and often you will find monsters there, being ghouls, alghouls, nekkers, drowners, etc. So your statement of The whole "monsters are drawn to rotting corpses" thing is complete BS. is erroneous.
But even if we go with the "dead deer count as corpses" idea, look at your expectation of "living, breathing ecosystem":. You expected that, after you kill a random animal at some random location, the carcass was going to rot over time, then, once rotten, attract monsters. That is very much in line with the re-population example I posted: you are expecting too much for what amounts to window dressing.
And please, stop using the term "AI". It isn't.