They're kind of in a weird position because each of those companies are sticking them up, but because mobile isn't the bulk of their revenue, they can afford the legal costs of proceeding against Apple even if Apple retaliates against them in the meantime. Whereas if they got kicked off all the consoles they'd be out of business before the court case is over.
The argument that the consoles are subsidizing the hardware is just an excuse which has the causation reversed. They're not charging 30% because they have to subsidize the hardware, they're subsidizing the hardware in furtherance of their scheme to charge 30%. Without it they would stop subsidizing the hardware, but so what? People would pay less for games and more for hardware.
You might even pay less for hardware, because there would be no more reason to restrict games to a particular console and then you would only need one to play all the games, and Sony/Nintendo/MS would compete like (or be replaced by) Dell/HP/Lenovo.
The argument that the consoles are subsidizing the hardware is just an excuse which has the causation reversed. They're not charging 30% because they have to subsidize the hardware, they're subsidizing the hardware in furtherance of their scheme to charge 30%. Without it they would stop subsidizing the hardware, but so what? People would pay less for games and more for hardware.
You might even pay less for hardware, because there would be no more reason to restrict games to a particular console and then you would only need one to play all the games, and Sony/Nintendo/MS would compete like (or be replaced by) Dell/HP/Lenovo.