Given that they could have easily get Steam Deck levels of compatibility with Windows games, but didn’t, I think they’re mainly after the App Store margins for ported games. Having an independent marketplace with tons of Mac-compatible games is a nightmare for them.
Apple is dogmatically anti games, they only spare bare minimum of effort to support videogames as an necessary evil. It's some Jobs' teaching thing.
gaming apps account for approximately 70% of all App Store revenue.
On the iPhone, where they go out of their way to prevent Steam or anyone else eating into that market.
On Mac it's probably closer to 0% of all revenue, and they seem incapable of competing for it.
Of course, I agree. Just saying I think they probably do have to care about the gaming market a whole lot, whether Jobs liked it or not
They tried, but didn't follow through. macOS is corporate abandonware and they don't want to undermine their iOS market with real emulators.