[pas]

Using numpy is fast, because it just uses the forever-optimized stuff bundled with it, and uses not much Python. But of course offers a handy interface.

Python suffers from the same problems as C in this regard. It's very powerful, easy to get going, because it doesn't force you into some "better" paradigm/architecture/ideology/thinking. (Like let's say mypy or Rust do.)

And that's okay. 80+% of Python scripts/programs are fine without that rigor, there are more important problems to worry about. (Like making the company profitable sooner instead of spending plus a few more months on figuring out the types/bindings for mypy/Rust.)