RegExp

As a long time listener and fan of Stef's work I am a little taken aback by the R vs K theorizing, which seems to be quite a frequent topic in Stef's podcasts nowadays. My problem with it, that it seems like one can make almost any claims about who is R and who is K and it seems to me impossible to falsify in any way. For example, in one podcast Stef said that Hillary Clinton is very clearly in the R camp. But as much I dislike her, she does seem to be faithful to her husband and they also have only one child. Aren't those traits suggesting that she is K selected? I'm sure you can find some counter arguments, but my question boils down to this: Is the K vs R theory, as applied to human beings, falsifiable in any sense? If so, what would falsify it? If it's not falsifiable, then does it really make sense to commit time and resources to it?