It does make plenty of sense, right? My dad is earning his doctorate in psychology, and that's one thing that he had learned during his schooling. It's worked wonders for me during this trip, and I hope it does for everyone who reads this too! But yeah, one ridiculous example of the deep-breath technique is the paper bag trick for hyperventilation. That's even been proven to worsen the situation and it was something my dad had brought up while explaining this method. It's also good to practice what I had explained while doing stuff that you love too. If you multitask it with focusing on your regular breathing, it could actually make your favorite activities more enjoyable!