Earlier quoted context omitted.
I am sorry if I didn't write it clearly. What I wanted to say is that Google required phone manufacturers not to make agreements with Google's competitors (e.g. not to preinstall competitors's apps or search engine as default) as a condition for obtaining a license for Google Play Services or Google Play. And this is bad for competition in mobile software market and bad for consumers. Instead Google should just sell…
Ah. So this goes to the question i ask: If Google had to do as you say (sell the software with no restrictions), why would google ever sell the software in the first place? Microsoft tried that and was fairly unsuccessful. Future folks would likely just choose the Apple model - don't sell the software at all.
There are not any future folks who can adopt Apple's model.
The only viable mobile OSes for the foreseeable future are Android and iOS, unless Android can be trust-busted. Even Microsoft couldn't do it. And they really tried.
If Android can be de-bundled, then Samsung can pursue Tizen, because Google will not be allowed to prevent it. They're the only ones with sufficient resources and market share to have a shot.
Edit: Or, ironically, Google—who are the only ones not bound by Android OEM agreements—with Fuchsia.