I do not believe that C or C++ are
inherently less secure than other languages, nor do I believe that there
is some statistical way of proving that fact. One can write good or bad
code in all languages.
I believe you are wrong. Some languages are more secure than other
languages. Of course an infallible superhuman could write good code in
any language, and a fool can write bad code in any language, but a
normal human programmer will write better code in a well-designed
language than in an ill-designed language.