@jwisser Of course, the designers at Apple could have drawn this (and any icon) however they wanted to, but the fault here (in my opinion) is the tools and the design direction for app icons.
The tool boxes you into a corner if you “have” to use it to get the style they defined for app icons. If you’re willing to ignore that dynamic lighting, you can have a lot more flexibility. To be sure, they did this to themselves, but I almost can’t blame a designer who has to live with these restrictions.