There's nothing inherent in being an engineer that means you can't appreciate good design.

No, but dismissing an app based on "bad design" (of a tiny icon, of all things) is just prejudicial, illogical silliness.

I agree completely, and that's what I do too. But I also understand that potential iOS users are not necessarily engineers and if my goal is to sell more apps to these naive users, I'd better find a good designer.