The only reason I have to use macOS for development is Xcode which I need to make iOS mobile apps. I used to use macOS in a VM with Linux as a host system, but it's just too slow and laggy even on good hardware.
You're just as uninsteresting as people not switching to Mac from Windows in 2010 because it doesn't play games.
I don't recall if the restriction is compiling on Apple hardware or under macOS but while people had iOS compilers running for a while I think they have fallen out of date.