The thing about C++ is that you need to recruit specifically for C++ programmers in a way that you don’t need to recruit for programmers in many other languages. The barrier of entry for C++ is high enough that you can’t just take your typical developer and ask them to write good C++, it’s a language which requires far more effort to become competent in.

There are also many places which just ask for Java/C++ experience for no apparent reason. Amazon is like this, all of their job listings mention C++ but only a very small percentage of the code base is in C++. There is at least 10 times as much Ruby code and it is part of systems that most engineers will have to work with, but no job application mentions that.