You're missing the fact that the constant factor differs between languages. The density (bugs per LOC) of memory handling bugs is much different in Rust than in C.
> The quote is either wrong or outdated. In the second edition, it's on page 521: "Industry average experience is about 1 - 25 errors per 1000 lines of code for delivered software. The software has usually been developed using a hodgepodge of techniques.
1-25 is not a single number - it is a range.