The passage you quoted is the standard "cover your ass" disclaimer that you can find in almost any social science publication today, where the authors basically state that their results become invalid the moment they are used to draw potentially controversial conclusions.

I've long learned to just ignore such statements. Either the data can be analyzed, or it's worthless. But which of the two is the case doesn't depend on the conclusion being drawn. In the Soviet Union, it was common for scientific articles to emphasize how the authors used "Marxist-Leninist science" to achieve their breakthroughs. I view those disclaimers as a modern equivalent to this phenomenon, unsurprising considering that scientific freedom during the past 20 years has been lower than at almost any point since the 18th century or so.