Its kind of like the OpenOffice vs. MS Office argument.
Is OO a good program? Yes. Is Office incredibly expensive? Yes. But if your a professional, you absolutely have to use Office because most others use it (compatibility), and the extra features and abilities make it very important to use as a professional.
I believe that most game studios and others that use Adobe products can get licenses to purchase large quantities of PS and other products at very reasonable rates.
Back from the dead, I'm afraid.