The toner-head argument is basically that decisions are being made by sales and financial teams who don't understand what they are selling.
I'm making multiple arguments here, but none are the toner-head argument:
Argument 1: iOS is a better platform to move into gaming on.
Argument 2: The compromises needed to make Macs good gaming machines are completely different to the direction Apple thinks is good for the Mac.
Argument 3: Apple has never cared about gaming.