The difference is safe-by-default languages force you to turn off the safeties before they will let you blow your own foot off. C++ doesn't believe in safeties

The difference is safe-by-default languages force you to turn off the safeties before they will let you blow your own foot off. C++ doesn't believe in safeties since (at the time the language was designed) it introduces an unacceptable delay between you wanting to pull the trigger and your target and/or feet blowing up.