i don't disagree with that argument, however, it comes down to value for the price point, and we as web designers/developers need a higher level computer to do our work. the things that make macbooks better are worth the money for us, by far.

however, as someone who has tried to convert people to macs, the main argument is something along the lines of "XYZ is a great feature but i don't and won't ever need it, so why should i pay for it".