You also have to factor in his salary but yeah, i wouldnt say it's unfair though. If Arenado also wants out, Rockies have zero leverage.
Salary doesn't hurt the Rockies because you're still getting at least 3 of his prime years at market rate. Yeah the back end of the contract is worrisome but you're not gonna convince them to eat money by sending Wright who's stuff looks meh and Wilson who's been getting hit a lot.
What good is Riley's power in coors if he can't get the bat on the ball? Again. Ludicrous homer offer.