That’s very interesting. I’m sure this is a legitimate and useful technique, but (and this is from a place of ignorance about this specific technique) it strike

That’s very interesting. I’m sure this is a legitimate and useful technique, but (and this is from a place of ignorance about this specific technique) it strikes me as something one should be extremely careful with lest one end up inadvertently p-hacking. It reminds me of another technique used in some fields: Grouping people into “responder” and “non-responder” groups and then looking only at the “responders”… It’s a dangerous technique because it seems sort of reasonable but almost always results in p-hacked rubbish.