Yes, I consider this an empirical claim. I have a fair amount of anecdata from people I’ve shared this with in person about this being a useful approach.
That said, I agree that some may not find this effective or will find it harmful; this is why I wrote “in many cases” rather than “in almost all cases” or “you will find” or similar.
If you do not find this technique effective, I suggest that you don’t practice it. I and a few friends found it useful and interesting enough to be worth disseminating.
If you can reliably emulate a wiser person, why not just be the wiser person?