Not all people have the capacity or financial ability to purchase a separate IOS iPhone or iPad, so running Apple IOS apps on Android using IOS emulators is a financially better option. Especially games that launch early on iOS take a little while to come on Android so it would make sense that you try to emulate them on the platform you readily have. Some of the apps and games are only available for IOS and not on Android so you may want to check them out.
There are a number of reasons why you would want to run Apple IOS apps on Android using IOS emulators.