The argument for utilization of the policy being at times unethical seems to rest on inferences of the "real" purpose.

The policy is what it is and unless deceit is employed in using the policy, no use of the policy can really be considered unethical. In personal relationships and transactions, other standards may apply but when conducting business in the corporate world the words of the policy mean what they say. Nothing less and nothing more.

Would I "buy" an item from them, use the heck out of it for 11 months, and then return it? No. Because it wouldn't feel right. But that's a function of ingrained societal conditioning. I can't mount a rational, logical argument that it violates ethical precepts without resorting to inference or assumption. If I meet the terms of the contract they offer, I really have to be on ethically solid ground.