And going the quotations in TFA, it seems the FSF's thinking about this is clear and nuanced, as usual:
> [T]he FSF makes a distinction between non-free and unethical in this case:
> > It may be that some nonfree ML have valid moral reasons for not releasing training data, such as personal medical data. In that case, we would describe the application as a whole as nonfree. But using it could be ethically excusable if it helps you do a specialized job that is vital for society, such as diagnosing disease or injury.