I don't think there are many people that say classes are bad outright. After all, you can write Go code that look identical to code in another language with classes. It's more about misusing OOP and unnecessary amount of abstraction people complain about.

Also, patterns in data science often don't transfer to general programming. Very few data scientists annotate their python types, let alone writing unit tests. Source control of Jupyter notebooks is often non-existent. It's a different way of doing things, and I would exclude numpy/pandas from discussions unless necessary.