I was given horses. I didn't follow trainers until later, when I went to further my education.
There came a time where some horses needed some extra help, and I was the only idiot who wasn't scared to do it. Someone mentioned the problem and I said "I'll do it".
I later followed suit in actually learning how to train from a trainer. She taught me for 2 years straight, 4 hours a day, 5-6 days a week on multiple different horses of different riding levels.
She taught me on horses who had never been touched, horses who were scared of their own shadows, horses who were out to hurt you, horses who were difficult school masters and just plain, run of the mill problem horses. It was like boot camp.
I loved it.