It's because the people that are good with math, finance, and programming don't want to use C++ (or live in Atlanta). Remove the C++, and it becomes much easier to find people. Look at how successful companies like Jane Street Capital are in recruiting, for example, even though the pool of people that know OCaml is much smaller than the pool of people that know C++.
(My experience with people that know math and finance is that they do all their work in Excel. That's because simple programs become 100-file boilerplate monsters in C++ and Java, and someone told them that Perl and Python are not real programming languages. Sigh.
OTOH, turning spreadsheets into production software is profitable and enjoyable. Let the programmers program and let the finance people do finance.)
(My experience with people that know math and finance is that they do all their work in Excel. That's because simple programs become 100-file boilerplate monsters in C++ and Java, and someone told them that Perl and Python are not real programming languages. Sigh.
OTOH, turning spreadsheets into production software is profitable and enjoyable. Let the programmers program and let the finance people do finance.)