> Why does anyone even dev for G or A

Because personal computers are a legacy platform for nerds and programmers, and smartphones are the most widely used consumer computing platform in the world. This desperately needs regulation. Unfortunately the EU is currently regulating the duopoly into law, making their phones necessary for ID verification, so we're probably completely fucked for at least a decade or two before we even have a chance, but that's still not a reason to shrug our shoulders and accept it.