Earlier quoted context omitted.
Tizen has other traits that might be more appealing, like the fact that it's open source. (And arguably, more open source than Android by far.) And if Samsung chose to start pushing Tizen phones over Android phones... bear in mind, Samsung is pretty much THE Android manufacturer, everyone else rides their coattails. Samsung is maybe the only company that can upset the apple cart as far as Google's concerned.
Without the Google Play Store Samsung's phones without Android are not going to sell.
(Why do you think people can iOS android but not android 3rd party? The adjustment is the same and not everyone buys a phone to play games with their friends)