Surely you aren’t talking about Android as “open source”. To a first approximation no one wants a phone running only AOSP without Google’s proprietary parts.
You're free to use the same Android that the Chinese OEMs (and Amazon) built their phones on yourself, without traveling to China. It's true that a reasonable definition of "no one" wanted Amazon's phones, but a much more lenient definition has to be used for the Chinese OEMs.