You can't program C / C++ in a memory safe way. I mean, in theory you can. But there is just very little help from the language, and modern computer prorams are so impressively complex that you are bound to make errors somewhere, and those errors can often be so weird that it is nigh impossible to catch them.
If it was just the odd issue here or there I'd say it's a programmer skill problem. But a significant amount of ALL security flaws / exploits across currently used software (most estimates are at least 70%, I've seen some as high as 90%) are directly related to memory safety issues in C and C++. Many major companies/organizations have basically come out and said that C/C++ causes significant issues for them because of its unsafety.
At some point you just have to accept that the fault lies with the language. Which shouldn't be much of a surprise when you consider how ancient they are, in technology terms
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