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Exactly! C++ is a language where you are free to choose level of safety.

None of your examples are a fault of the language - it is a fault of developer not doing necessary safety checks.

The point is: some languages have capabilities to take some classes of errors out. A language with GC and heap-allocation only makes it hard to get access-after-free-style errors. Languages with bounds checks on all elements reliably crash (throw an exception) instead of showing "random" behaviour on bad reads. Of course all of that comes with a cost, but for many domains that works out ...

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