Those libs likely only exist because of how easy python is to learn. So, snake tail situation maybe.

I haven’t used matlab for 10+ years, but back then Matlab used to provide engineering packages for vibrations and non-linear models approximations, I’d imagine the effort of going Python/ open source code to just to redefine your model for both purposes and then validate and verify the results would be a 10-50 fold cost of paying for a license

Well, a lot of those libraries are C libraries that have Python bindings.