The key fact that you're ignoring is that, as you implicitly acknowledge, "in some cases" it says absolutely nothing about efficiency or safety. Software isn't magic. Your software design practices, and consequentlg yout software, doesn't magically become safe and efficient just because you switch language/framework.

The days where the myth that using language X bought you more speed are long gone, along with the credibility kf those who keep making those baseless claims.