Two things. One, I have an MBA, and my boss doesn't. My company (a major fortune 200 one in the area) doesn't really care that I have a grad degree and she doesn't. i've found the opposite of what you're saying is true--that having an advanced degree isn't that important sometimes.
Second, if I'm hiring for a job, and I have 300 applicants, and many of them have similar experience, wouldn't you rather have someone with a masters or beyond, instead of an AA, all other things being equal?