The average Mac user is dumb and you can't deny it. The majority of them don't need one and bought it because everyone or all the cool kids have one. I made the same mistake years ago and bought a MacBook Pro. In my case it was a big mistake and waste of a lot of money. After that I switched over to Linux which was by far the best decision, specially for an average user who doesn't play "normal" video games.
Most porn games run on Mac either natively through RenPy SDK, Nwjs, Electron etc. or non-natively through Wine. There might be some issues with Unity, Unreal or some Japanese engines - but most of the time they run fine. However, the biggest issue right now are Apple's M1/2 chips since they are based on ARM architecture. That's why average users and non-games should consider to switch over to Linux instead to Mac.