London, you are absolutely correct. I have trained for over 40 years and competed Nationally for five. Mike Mentzer was a wealth of information. I trained alongside Boyer Cole and Danny Padilla. I saw how these professionals trained. I have also seen how some of these fake fitness instructors trained clients. It's embarrassing and I feel bad for the clients. Over the years I have joined a few new gyms due to relocations and part of the intro was two free training sessions. Often time the trainer would see me. I could watch them scan my body and then some would just say, "It looks like you know what you are doing let me show you around." None of them put me through what I would classify as a decent workout. I always tell people to be cautious of fitness trainers.
One trainer I knew from a gym I belonged to for many years was sleeping with most of his clients.
It's a sad refection on the industry.