This most certainly wouldn't have happened if "open source realism" didn't stood against free software "utopian" idealists. I still remember the "Linux Kernel is now in most devices in the world" when Android came out. This didn't went well, didn't it?
Lastly, isn't redhat an enthusiastic supporter of open source ? The domain https://opensource.com/ is literally copyrighted and supported by redhat...
I don't understand your point here. Could you please make it again, more directly?
Which android are you referring to? The table at https://en.wikipedia.org/wiki/List_of_custom_Android_distrib... may help you.
I don't think that, say, Lineage or Calyx share the same privacy concerns as Google's android variant, or the myriad vendors' proprietary forks.
Of course, if most of Android were GPL instead of Apache, the lockin wouldn't be possible.
If you're referring to locked bootloaders and not being able to use the GPL kernel due to that, that was a defect in GPLv2 that was fixed in GPLv3 (that and software patents). TiVo was the one that induced that change, and the term was "tivoization."
From wikipedia: Red Hat, Inc. is an American software company that provides open source software products to enterprises