And that is different from desktop Linux exactly how?
Do you remember the time when 'desktop' Linux was present on a multitude of cheap and small computers? You know, so called "netbooks"? Do you remember that most of them shipped with the crappy Poulsbo graphics? Android is no different from desktop Linux, it has exactly the same problems.
So your argument is basically: "My imaginary desktop-Linux-on-mobile is superior to Android because it would have all open-source drivers developed by community. Also, unicorns and world peace."