Making games, selling games and making a living are three different things.
Many do gamedev just for the sake of the art.
It's just excuses if a $100 million project can't deliver what a couple of people without any real budget can.
But again: they want your money and it is not going to the actual developers and artists. At least, most of it isn't.
Indeed, and those artistics usually don't get a damm about platforms beyond getting exposure to their work in some form.
Walking the corridors of GDC(E), PAX seldom turns into discussions about OS and 3D APIs, rather business opportunies, publishing contracts, turning ideas into contracts.
Street musicians and art fair artists also do stuff big labels and architure societies don't care about.
Those indie devs hardly do any support and QA testing at scale.