C++ can be written to be safe. I don’t think WH is the right authority to issue this warning. Naming C++ rather than going after specific features is unfair.

I suspect that the white house just received a report from some people in the industry stating that faulty software is vulnerable to attacks from bad actors, and from that basis they just went the simplistic path of arguing that 1) lots of software is written in C++, 2) that software has bugs, therefore if we don't use C++ then we won't have bugs.

As a branch of government, their role is not to evaluate technical merits of proposals but to hear what their representatives have to say.