I see many C++ programmers say stuff like this, and maybe it is the case that studios exist which can do C++ without mistakes related to memory management or sigils and so on, but I also observe that:

1. High quality teams like the Linux kernel team and PostgreSQL, do periodically have serious security bugs that are things Rust would have caught.

2. I see sometimes C++ instructors making the same claims you do and then spending half of a lesson tracking down a memory mistake, (Casey Muratori) or in the same month a tweet from a game engine developer saying they don't really see the value of garbage collection and then tweeting about how they spent 48 hours tracking down a memory mistake. (of course, for a game engine that is what you have to do sometimes!)

There are however valid questions, like if Rust slows down your development say, 5%, would you get more net safety from spending 5% more time testing/fuzzing c++ code instead? etc.