Apple doesn't care about gaming on their platform at all. It is like they are trying to push away gamers by stopping support for 32 bit libraries and older APIs that games use. It is no surprise that Valve doesn't want to support Apple either. Linux is a truly open platform and is beneficial in the long run for Valve as a company and gaming in general and the effort the community puts into projects like DXVK, wine, mangohud, and proton GE. By contrast Apple and Microsoft want monopoly and don't care about community.