In all other fields of IT, we have language choice. Back end? We can use Java, Python, C++, C#, Ruby, PHP, Perl, etc. Plenty of jobs for all of them.
Data science? We can use Python, R, MATLAB, Java, C++, etc. Plenty of jobs for all of them.
Mobile? We can use Java, Kotlin, Objective-C, Swift, C#, Dart, etc. Plenty of jobs for all of them.
I do this for them. I do this out of conscience. Personally, I gain nothing.