What's the point of such an incendiary comment? No, you aren't understanding it right. At worst you are offering a deliberately misleading interpretation. Here's what the link says:

         The Boston housing prices dataset has an ethical problem: as
            investigated in [1], the authors of this dataset engineered a
            non-invertible variable "B" assuming that racial self-segregation had a
            positive impact on house prices [2]. Furthermore the goal of the
            research that led to the creation of this dataset was to study the
            impact of air quality but it did not give adequate demonstration of the
            validity of this assumption.
            The scikit-learn maintainers therefore strongly discourage the use of
            this dataset unless the purpose of the code is to study and educate
            about ethical issues in data science and machine learning.