Why? Because some misguided designer thought it looked cool (after all, if you are a UX designer, it's your job to suggest sommething different, saying "the app

Why? Because some misguided designer thought it looked cool (after all, if you are a UX designer, it's your job to suggest sommething different, saying "the app looks and works great as it is, let's not change anything" doesn't quite cut it), and nobody else involved cared enough to challenge this decision?