Consider that mass production lowers the price. If Apple were to tailor make a product just for you, it would cost millions, not $2499.
That the products would be cheaper with the features you don't want is an illusion. Apple wants to produce a product that sells well. If adding things that you don't want means it can sell better, it means they can make money. If they make something that there is not a big market for, the product won't exist at all.
I remember when I paid extra for an Airport card for my iBook G3. Today it is included with all laptops and they're are cheaper.
So if people want 3G you should be happy it's included if it makes it sell well as long as it doesn't detract from your experience even if you don't use it (eg. doesn't add a lot of weight or use a lot of power). Since it might mean Apple can sell at lower prices, not higher.
That said, I know the feeling of wanting simpler and less cluttered tools. One thing I like about the Air is that it gives you slightly smaller computer in exchange for giving up the optical drive. I almost never use CDs or DVDs anyway, those technologies are ancient ;-)