Being part of distros doesn't mean they are installed, specially on commercial UNIXes since compiler tools became a separate product.
Better read the history of gcc, it was commercialization of UNIX C compilers introduced by Sun, that made people start paying attention to gcc. Until then it was a largely ignored effort.
Finally I don't believe that anyone skilful enough to learn how to install Linux, is not able to install a compiler.
Hell, noobs rPi’s come with the Wolfram language too.