Android Studio/IntelliJ may be excellent to you, and I'd agree the IDE is better than XCode as far as slinging code into an editor is concerned. However the Android development system isn't just the IDE: it's the build process, integration with debugging tools, and the APIs. Java doesn't have to be a bloated mess of over-engineered cruft. I've seen wonderful, clean Java. Android development is the opposite of that.
Kotlin may be great. I haven't used it much, but so far I'm finding it can't hide Android's bloated, over-engineered substructure.
The build process is significantly better in Android world once you actually take a look at how the build process works and need to start doing automated testing and deployment. Xcode tools for actual continious development beyond manual clicking are horrendous and waste a huge amount of people hours.
There's third party solution for iOS build automation - https://fastlane.tools. I didn't tried the whole end-to-end solution, but pieces I tried worked very well.
Unfortunately, the support for managing code-signing in Fastlane isn't quite fully-baked, and it can get messy. It's still really useful, though, if you have to deal with iOS builds.
We used that, but sadly it doesn't help with CI, constant simulator / connected device issues and breakages in toolchains when Apple releases new Xcode :(
Kotlin may be great. I haven't used it much, but so far I'm finding it can't hide Android's bloated, over-engineered substructure.