That's MOST Personal Trainers!
With the advent of Grey Cook and all the physical therapy guys getting famous, now all personal trainers (well, not ALL, but all the douchbag ones) want to act like they are physical therapists and do all sorts of strange exercises from the physical therapy world. They are wasting their clients time 90% of the time, not to mention all that money.
All you have to do is look at their physiques. If they are 22 these trainers are probably more muscular than the average person, but just about ANY 22 year old who eats half way right and lifts will gain 10 pounds of muscle or so. To them this makes them an expert, and the general public has no clue how clueless these guys are. For women trainers, it's similar. I see these 20 year olds who are nothing but skinny training chubby women. They make them do the most asinine, useless stuff that does nothing to achieve their goals.
Beyond these types, you'll see the older trainers who not only don't have any added muscle at all, but they look emaciated. Yet people pay them because they (the clients) are fat and he (the trainer) isn't, so "he must be an expert, right?"
It's annoying! Just try to focus on yourself, don't get distracted by these fools. They pay the bills in many gyms, making it possible for people like us to have a place to train. We need them, as annoying as they are...