The standard reply to this that has been repeated over and over is that for 99.99999% of the people performing such a task they are not going to implement the work intensive logic, they are going to use a well-tested and well-supported library that is built and maintained by domain experts.

Which can have bindings to every language in existence, thus diminishing even more the role of Python.

Given the choice between using library bindings in Python and similar bindings in C++ or Java, the world has voted with their feet. When it comes to easy to use glue languages, Python won.

Who said those are the only two options available?

Python seems to have won.

Yes! People who compare python to Julia miss the point. Python is not really used as a programming language, Python is the new bash.

Tcl did it first, look where it is now.

Alternatives abound.

Why would it diminish the role of Python ?

One of the strength of Python is its capacity to integrate with anything. We never said it was the only language with that strength.

With Python comes an ecosystem, another language another ecosystem. Choose the tool that fits your need.

That's a function of the available tools, not of the opportunities to do so. Julia makes writing custom kernels easy.