Are gym personal trainers over-rated?

No. you can say the same about any profession: lawyers come to mind first.

The truth of the matter is that very few people actually enjoy their job, whether they work at customs , sell donuts or do dentistry.

When you look at it, it is one of the only job that will pay 6 figures without much education. In fact, many personal trainers earn more than chiropractors who have done 6 more years of formal education than them.

The distinguishing feature in any job is this: does the person constantly refine their skills…like Bruce Lee, who went to see the top person in every martial art to refine what became his own martial art: Jeet Kune Do.

I don't agree to this, 

But yeah they are some people who just sharing their filed experience not the knowledge. 

They don't know about the science behind the workout they just say go and do the dumbell curls. 

The same workout will not work for everyone, the same diet will not work for everyone. Remember when you are going to hire a trainer, make sure he's certified from a good institution. 

Yes. Everyone I know who got into good shape did it without personal trainers. The only time I’ve ever seen trainers do any good is for people that are already in good shape that are preparing for a sport or contest. Also personal trainers seem to do well with celebrities whose career requires them to be in good shape.

I’ve never seen a personal trainer take an out shape of person and transform them into a fit person. Every one of them failed or had results that were barely noticeable. Since personal trainers aren’t cheap, I’d recommend against one since spending a large amount of money doing something you probably do not like isn’t something you likely will stick to.

I recommend just getting a program off the internet and go to a gym with a lot of fit people and just try to get friendly advice whenever you can get it.