Earlier quoted context omitted.
I believe what you describe is basically a preference for a language you already know. I'm quite proficient in JavaScript and could repeat everything you say about ... JavaScript. OTOH I had to do things in Python a bunch of times, and it was always very frustrating.
The JavaScript ecosystem is objectively smaller. JavaScript doesn’t have a foothold in data science and ETL, nor deep learning, nor DevOps. There are no decent ORMs in JS, and Python has several. JS is poor for numerical and scientific programming.
But I think this thread is about being comfortable with the language itself rather than an ecosystem.