Does Apple not offer a loaner laptop during that period? If not, I'm quite unimpressed. These laptops are expected to be purchased by working professionals... what does Apple imagine is the customer workflow when an issue arises? Pause your work while the laptop is in repair?
They do not. I've heard their recommended advice if this is a problem is to fork out and purchase yet another laptop at your own cost, and return it within the return window.
So any bump on the aluminum that the store clerk doesn't approve of would cost you around $800? (since I assume the only way out would be selling it second-hand with a huge discount)