The long and the short of it is that once a claim has been triggered the insurance companies have all the control. From their standpoint, why would they give you $10,000 when they could give the body shop $8,000?
From your side of the equation I absolutely see why you would want the car written off but the insurance company is paying the bill so they get to decide. I'm kind of surprised that they're spending that much though. Usually once you hit about 75% of the market value they dump it.
"Masked Bandit is a gateway drug for frugal spending." - Unknown303