Earlier quoted context omitted.
Somebody has to say it.
Though I agree with both of you, I think that there is a certain amount of success that drives these designs to continue to be made. In retrospect it's quite easy to criticize the design here and naturally, we are all pretty unanimous that it could be much better. That being said, saying "it fails because it uses textures" is very different than "it fails in it's use of textures". Try doing a ghetto case study by ask…
Everyone of all design understanding levels understands a sense of craft. Subtle gradients, shadows, textures, and effects go a long way to creating a 2d digital object of worth.
Nothing in the real world is a solid color--it has light, texture, and materiality. Stripping a visual of all of these characteristics creates an uneasy steril-ness that can feel flat and or cheap.