Don't let perfect be the enemy of the good. Think about how many Steam Decks have been sold. Game devs are already actively targeting the Deck. If porting games to Mac can be made easier, we all need to actively encourage it. Unfortunately, the only way we get Apple to give us more game dev tools is by porting the games.
I have a Steam Deck and a Mac. I would love to play half the games from my Deck on my laptop.