Looking at Steam and the Mac App Store, the game is normally $60, and is being discounted to $30 for what looks like the holiday - so it is no more than the PC/Mac version. Please correct that part of your argument since it’s provably false. If the PC version stays $30 after the holiday, then I’ll be more inclined to agree with you about pricing.
While history has proven that full price games have failed, the games being put out at full price weren’t worth it. For example, I bought Titan Quest at the full $7.99 which was pretty close to $5 over the price at GoG and other outlets and…it never got updated. Now the Switch is gettting the full Anniversary edition. XCom was an ok port, but having to buy the game twice was absolutely not the way to do it since both games were more than their respective PC outlets, and the control scheme needed work.
This is why I’m hopeful for Civ 6. It has feature parity with the Mac version. Now that all the work has been done to adapt the control scheme, updates should be easier when the Mac version is complete. Aspyr has also done a pretty good job with KOTOR and Jade Empire. Are they the best port maker? Ehh…that’s debatable. But they haven’t done the App Store wrong in their history of apps.