it is not anyone's claim that the existence of C cves means it is impossible to write correct C

the point that is being made (obliquely) is that manual memory management is not possible for human beings to do effectively at scale

at scale means across a broad demographic of programmers, working on a broad set of programs

if you wanted performant and portable then C was all you had for a long time, and there is a lot of good software written in C, but that does not mean that it is a good tool in perpetuity

strcpy and pointer arithmetic are basically not possible to get right

we need to move beyond this very low level of abstraction