I spend most of my time waiting on IO, something like C++ isn't going to improve my performance much. If C++ takes 1ms to transform data and my Python code takes 10ms, it's not much of a win for me when I'm waiting 100ms for IO.
With Python I can write and test on a Mac or Windows and easily deploy on Linux. I can iterate quickly and if I really need "performance" I can throw bigger or more VPSes at the problem with little extra cognitive load.
I do not have anywhere near the same flexibility and low cognitive load with C++. The better performance is nice but for almost everything I do day to day completely unnecessary and not worth the effort. My case isn't all cases, C++ (or whatever compiled language you pick) will be a win for some people but not for me.
With Python I can write and test on a Mac or Windows and easily deploy on Linux. I can iterate quickly and if I really need "performance" I can throw bigger or more VPSes at the problem with little extra cognitive load.
I do not have anywhere near the same flexibility and low cognitive load with C++. The better performance is nice but for almost everything I do day to day completely unnecessary and not worth the effort. My case isn't all cases, C++ (or whatever compiled language you pick) will be a win for some people but not for me.