While you are technically correct, those who study C++ security note that those are a tiny minority of all security errors. Still an issue, but not nearly as common an issue as the ones that come from the C roots of C++.
https://en.wikipedia.org/wiki/No_true_Scotsman
Also can you link to an example of this purported memory safe C++ compiler? Please note for an apples to apples comparison it must reject all memory unsafe non-modern C++ constructs.