Go ask any professional about glossy screens. They'll give you a similar answer.
Yes . . because all professionals agree that glossy monitors are impossible to work with.
By your logic, if I were to ask a professional your 'glossy screens' question, they'd probably tell you that you shouldn't be using any laptop screen for design. You should be using a 'true' RGB monitor.
Also, if you haven't noticed, Apple is marketing to the masses (the average consumer), which is much more profitable than the classic designer or movie industry user. They're even gaining a bit of market-share.
That being said, your average movie industry user or designer is going to be using a tower with a separate monitor rather than a lappy. If the glass annoys you that much, buy the previous generation. There are also other laptops on the market, but I think you'll find nearly all of those also have glossy screens.