Function vs. eye candy

[Lynara2]

How many of you remember setting up your EQ UI's for hours not simply for their function but for the beauty in each frame? Here are some excellent examples: T.King mods

So I wonder, why in WoW, a game bounding with artwork that EQ can never know are we left to so many bland unit frame mods. Neon, neon and you guessed it... more neon. Default metal frame, no frame... default metal frame.. no frame. These are our options. This isn't me pointing and blaming authors but rather asking why? Is it that there is no interest or is it something within the game itself that disallows the ability to insert some creativity?