Valve has a spear lined up at so much of big tech right now it's honestly impressive they've done it in stealth for so long. Google, Microsoft and Apple are all in the crosshairs in a big way, and I don't think they can avoid the blow that's coming without cannibalizing their margins.
I'm not sure they've got Apple targeted so much, because Apple has been so thoroughly not-invested in gaming. The place they're closest to colliding is VR, but Apple's Vision headset is doing something really different from Valve's VR products, which are far more directly lined up against Meta's Oculus. Valve could branch into Apple's areas, but they don't seem particularly interested in doing so yet. EDIT: rather, A…
Apple cares about gaming on their iDevices and related Apple store profits, macOS not so much.