Why would The Cheesecake Factory have let itself be portrayed so insipidly on Big Bang Theory?

For a chain, it's an upscale, fairly polished restaurant with good food and sexy waitresses in crisp uniforms, but Big Bang Theory shows it as a bland, Dennys-type diner. Penny's uniform looks like something a dumpy cafeteria server would have worn in the 1970s. The Cheesecake Factory's world headquarters are literally down the road from where the show is supposed to take place (and not much farther to where it was filmed).

Why would The Cheesecake Factory have let itself be portrayed so insipidly on Big Bang Theory?
Why would The Cheesecake Factory have let itself be portrayed so insipidly on Big Bang Theory?
Why would The Cheesecake Factory have let itself be portrayed so insipidly on Big Bang Theory?
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