This is a very small collection of toy datasets that this machine learning library includes for the purpose of illustrating the behavior of the library: http://scikit-learn.org/stable/datasets/toy_dataset.html

It’s out of the scope of this library to publish all datasets in existence or highlight particular datasets that are relevant to particular societal problems. It’s literally just a few datasets so that you can play around with the ML library without downloading any external datasets. I think it’s fair to allow them to exercise reasonable discretion in their choice of which toy datasets to ship with their ML library.