Not sure about the snobs part as I think those who use Macs are now such a wide group it would be hard to assign a personality trait to all of them.
However I think this:
Is bang on. When someone says I like/ need/ enjoy product X and other say you don't is rather pointless. If you like or enjoy a product, then someone else telling you, YOU don't is pointless. Also telling someone they don't need a product but simply want it is also pointless, (mentioning no names, cough, cough). As other than air, food and water it is possible to argue you don't need anything, so everything is a want.
You don't need a laptop at all. It is physically possible to carry a mini tower, screen, keyboard and mouse in a hiking backpack. So even a laptop is a want. You don't need to work in IT so a computer is a want. You don't need central heating as you can wear a jacket indoors so it is a want etc etc
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I just read my post again and thought it is worth clarifying what I mean:
Statement : Everyone needs a 17" laptop
Acceptable response : I don't, and a lot of other people don't
Statement : No-one needs a 17" laptop
Acceptable response : I do and a lot of other people do.
Statement : I need a 17" laptop
Trolling erroneous response : No YOU don't
I'm confident the 17" MBP and the Mac Pro are both going away in the next refresh. However, Apple will decide what we need and then offer it to us. If they decide we don't need 17" laptops anymore, they will discontinue the products. And those who want a new laptop will buy whatever Apple has determined we do need. This is all.