Sure, you're right about running macOS on non apple hardware but I know a lot of windows user do that and if you're a serious developer why not just buy an apple computer. I really doubt the cost of the apple computer to then compile isn't going to be paid off from macOS users if the game is any good.
Renting out a mac mini isn't raising the cost or complexity to something unreasonable either. It's like people are forcing their ideology upon a company that decided whats best for itself.
The hardware comment your wrote in regard to mine is cherry picking out the part where apple users know they're overpaying for the hardware they get.