Yes, I'd agree with all of your points really. You can see in my reply below that I was mostly advocating for it's use in learning the concepts behind GPU programming, so you can skip delving into C/C++ if you're uncomfortable with that.

If I had to pick something today to use for arbitrary GPU acceleration in Python I'd almost certainly opt for JAX instead, but I haven't seen the kind of tutorials in JAX that exist for NUMBA CUDA.