The GPU is critical to future profits though. Apple really wants your monthly subscription to Apple Arcade and they want to expand in other game areas which is why they've been paying AAA companies to optimize for Mac. This also ties into their VR headset where gaming will be one of the core features.
Hardly any AAA companies are optimising for the Apple GPU. MoltenVK is where all the interest is.
Even if they did, there is very little in Apple Arcade which taxes the GPU, most target the lowest common denominator in terms of supported iOS/phone combinations.
The original Apple Arcade strategy was for AAA titles, but for whatever reason that wasn’t pursued, so now we have a tonne of casual games and re-releases of old titles.
> The original Apple Arcade strategy was for AAA titles
Can you prove that statement? I bet you can't, cause it's simply not true. Every Arcade title is playable from an iPhone to a Mac by way of Apple TV. It was never going to get AAA titles.