[chromedev]

The operating system is open source. You are trying to say Google apps and services are part of the operating system, but they aren't. I take it you've never installed a custom Android ROM before, who frequently don't package gapps? Are you suggesting that before you have an operating system, you have to install the gapps APK?

[zepto]

Certainly some of the apps and especially services are considered part of the operating system by most people.

You only have to look elsewhere in this thread to see all of the features which have been moved out of AOSP into Google Play Services to see this proved.

[chromedev]

So you're suggesting that without Google specific proprietary apps and services that Android doesn't boot up and the phone can't be used with third-party apps?