The complete sentence from the study is: "Our results provide compelling evidence that all human traits are heritable: not one trait had a weighted heritability estimate of zero."
Like it has "social values" and "activities" in there but as far as I can tell it includes samples from various different countries. As long as twins are slightly more likely to end up living in the same country even when adopted - then its hard to say a score of like 0.1 has anything to do with genetics. I'm sure they tried to adjust for it somehow, but I'm pretty skeptical the headline result is capturing anything meaningful.