Because iPhone users think that everyone wants to be like them. It's some revenge of the zombies breakfast nerd club. It's really high school like. It's like they don't have perspective, at the end of the day, it's a phone. That's it, you aren't going to gain status from a phone. If you need your phone as a status symbol, you're a nobody anyway.
Plus a lot of iPhone uers aren't knowledgeable of other phones. Because you're popular, doesn't mean you were first. Nokia, Windows Mobile and LG were doing a lot of the things that they try to lay claim to. Your phone looks like a iPhone, no, your phone looks like a LG Prada. You didn't have the first app store. You didn't have the first touch screen phone. I think if they were more knowledgeable they'd complain more about the spoon fed updates Steve Jobs has been feeding them since the first iPhone. He gives them just enough for them to think they're getting something new. Just like the iPhone 4, great phone, but why does it have that antenna and glass all around when 90% of the people are going to put a case on it?
The first argument you'll hear, well my phone sold blah blah blah. You'll constantly see that point brought up. As if so and so many people can't be wrong. All of a sudden Avatar is the best movie of all time. If you see somebody else out dressed the same as you, are you going to be happy? See I knew this shirt looked great, that's why five other people are wearing it. I think I'm going to go out and buy a Toyota Camry tomorrow, because it's the most popular car. I thought it was about individuality.
Sometimes I swear the iPhone emits some sort of waves that takes over peoples brains and turns the logical and individualism part of the brain in to fanboyism.
I know that even if I see another Evo, it's 99% likely it won't be the same. Be it the case, icons, wallpaper, something. It's not even about I've had two Android phones, I noticed it when I had a Blackberry.