LOL I made the opposite switch!
My father was an Olympic weight lifter and my mother an Olympic gymnast.
I served as a fitness instructor in the military (not UK), which included 3 years intensive training in civilian academy and military institute.
Most PT's have somewhere between 1-5% of my knowledge.
I started as a PT and just quickly realised it's a popularity contest and has nothing to do with biomechanics and exercise science but it's like:
5% Getting people to move (any movement at all, regularly)
95% Building a brand, community politics and psychological manipulation on clients
Many times, I would get a young dude who is skinny and wants to attract ladies and scare dudes off by being puffy.
And I would see that their body is just not built for bodybuilding and I would explain to them why the pictures they are seeing are unrealistic for them.
Then, they leave me and pass many PT's until they find the one who pushed them PEDs/AAS/SARMs...
Few years and torn rotator cuffs later, they are a wreckage of a man and have mental trauma linked with exercise...
Ladies are a bit different. They look for PTs that agree with them on their insecurities (?!?) and make them sweat and hurt a lot.
If they don't feel knackered after the workout, they think they got ripped off during the PT session...
Even though 50% of body-building exercise is making sure you do the minimum to signal your body to make changes... You aren't supposed to hit your limits...
And then what happens is that the body has mechanisms to force you to stop (symptoms similar to depression, narcolepsy, low testosterone, etc...).
- Which is why most gym cards go vastly underutilized...
I couldn't rip off people and I was never a populist.
So I moved to IT and now I am ripping off corporations, instead :D