That's actually working technique in sports psychology – one version of it called VSM (Video Self-Modelling), where edited video shows athlete performing correct/advanced technique. It tricks brain to belive in "future self". I'm not surprised it works with photos that well, but I think it's not studied yet. These AI photos I make a very different from, say, photoshopped faced. I tried it on myself too, and can confirm that it does have psychological effect.