Dreadful argument. Cosmetic damage harms the resale value of your laptop, and if you intend to sell it on such things are a real issue. One does not have to be a "fanboy" or "computer geek" to wish to receive something that is dent-free.
It's your prerogative of course to not worry about such things, but it is anybody else's to be disappointed and get it replaced. It is mystifying that you suggest that this trait is unreasonable.
Sigh.
• Firstly, Godwin's Law.
• You say people spend money on Apple to get OS X. Why do they do this? Because OS X is quality. Therefore, the money on Apple = money on a quality product.
• Regardless of whether you are purchasing a £400 Dell or a £2,000 MBP, it is reasonable to expect a new laptop to be free of all defects, and certainly within the industry norms for things such as dead pixels, etc. Am I saying that such a complaint about the gap is one I agree with? No. Am I saying that it is reasonable to query such a gap if you feel that it will have an impact on the ruggedness of your laptop, especially when carrying it in a backpack etc? Damned right it is.
It is not your point of view I am so much querying, it is more your attitude. You have expressed it in such an incredibly unreasonable and obnoxious way as to reduce much of the merit your argument has.