How is that even challenging the fact Apple and Google have a de-facto duopoly and that it is close to impossible to compete against them currently ?

Your point just a subjective opinion about Android that does not bring anything to the debate.

The original question was "why is Apple so dominant?" and the response was basically "they have a lot of network effects helping them" which, while true, ignores the possibility that they are so dominant because they have great products that people want to use and will pay a large premium to use.