Just like I can't run Android Studio on my Pixel or Samsung Tabs, but for some reason, that doesn't seem to get people hopped up. Why should I expect to run Xcode on a consumption device? And yeah, if I want to run Xcode, I need a Mac just like if I want to run Android Studio, I need a computer.
Also, I don't want to run Xcode, it is arguably the worst development environment and hasn't gotten any better over the years.
I have to use Xcode regardless, if I want to develop for iOS or macOS. I don't have to use Android Studio, I got plenty of alternatives for that.
And of course, android studio is available on three platforms. Apple could choose to do the same.
What platforms is XCode available for?
There are plenty of real jobs where people do real work that do not require a development environment.